diff --git a/PubSub/metadata/V1/Pubsub.php b/PubSub/metadata/V1/Pubsub.php
index f3a95c0e8a4c..8f4190a08cc3 100644
Binary files a/PubSub/metadata/V1/Pubsub.php and b/PubSub/metadata/V1/Pubsub.php differ
diff --git a/PubSub/samples/V1/PublisherClient/delete_topic.php b/PubSub/samples/V1/PublisherClient/delete_topic.php
index 6ab5dff2bb96..b4c56d8c9bf3 100644
--- a/PubSub/samples/V1/PublisherClient/delete_topic.php
+++ b/PubSub/samples/V1/PublisherClient/delete_topic.php
@@ -34,7 +34,7 @@
  * configuration or subscriptions. Existing subscriptions to this topic are
  * not deleted, but their `topic` field is set to `_deleted-topic_`.
  *
- * @param string $formattedTopic Identifier. Name of the topic to delete.
+ * @param string $formattedTopic Name of the topic to delete.
  *                               Format is `projects/{project}/topics/{topic}`. Please see
  *                               {@see PublisherClient::topicName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/PublisherClient/get_topic.php b/PubSub/samples/V1/PublisherClient/get_topic.php
index 74e3fb5ff8be..79844c0e34a1 100644
--- a/PubSub/samples/V1/PublisherClient/get_topic.php
+++ b/PubSub/samples/V1/PublisherClient/get_topic.php
@@ -31,7 +31,7 @@
 /**
  * Gets the configuration of a topic.
  *
- * @param string $formattedTopic Identifier. The name of the topic to get.
+ * @param string $formattedTopic The name of the topic to get.
  *                               Format is `projects/{project}/topics/{topic}`. Please see
  *                               {@see PublisherClient::topicName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/PublisherClient/list_topics.php b/PubSub/samples/V1/PublisherClient/list_topics.php
index a5a3a327d61f..d7fc27d81950 100644
--- a/PubSub/samples/V1/PublisherClient/list_topics.php
+++ b/PubSub/samples/V1/PublisherClient/list_topics.php
@@ -32,7 +32,7 @@
 /**
  * Lists matching topics.
  *
- * @param string $formattedProject Identifier. The name of the project in which to list topics.
+ * @param string $formattedProject The name of the project in which to list topics.
  *                                 Format is `projects/{project-id}`. Please see
  *                                 {@see PublisherClient::projectName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/PublisherClient/publish.php b/PubSub/samples/V1/PublisherClient/publish.php
index 24e68d32612d..29c66f0182ec 100644
--- a/PubSub/samples/V1/PublisherClient/publish.php
+++ b/PubSub/samples/V1/PublisherClient/publish.php
@@ -33,8 +33,8 @@
  * Adds one or more messages to the topic. Returns `NOT_FOUND` if the topic
  * does not exist.
  *
- * @param string $formattedTopic Identifier. The messages in the request will be published on this
- *                               topic. Format is `projects/{project}/topics/{topic}`. Please see
+ * @param string $formattedTopic The messages in the request will be published on this topic.
+ *                               Format is `projects/{project}/topics/{topic}`. Please see
  *                               {@see PublisherClient::topicName()} for help formatting this field.
  */
 function publish_sample(string $formattedTopic): void
diff --git a/PubSub/samples/V1/SubscriberClient/create_snapshot.php b/PubSub/samples/V1/SubscriberClient/create_snapshot.php
index fa6f7c1cd96c..33f7c8ea1349 100644
--- a/PubSub/samples/V1/SubscriberClient/create_snapshot.php
+++ b/PubSub/samples/V1/SubscriberClient/create_snapshot.php
@@ -46,10 +46,10 @@
  * generated name is populated in the returned Snapshot object. Note that for
  * REST API requests, you must specify a name in the request.
  *
- * @param string $formattedName         Identifier. User-provided name for this snapshot. If the name is
- *                                      not provided in the request, the server will assign a random name for this
- *                                      snapshot on the same project as the subscription. Note that for REST API
- *                                      requests, you must specify a name.  See the [resource name
+ * @param string $formattedName         User-provided name for this snapshot. If the name is not provided
+ *                                      in the request, the server will assign a random name for this snapshot on
+ *                                      the same project as the subscription. Note that for REST API requests, you
+ *                                      must specify a name.  See the [resource name
  *                                      rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
  *                                      Format is `projects/{project}/snapshots/{snap}`. Please see
  *                                      {@see SubscriberClient::snapshotName()} for help formatting this field.
diff --git a/PubSub/samples/V1/SubscriberClient/delete_snapshot.php b/PubSub/samples/V1/SubscriberClient/delete_snapshot.php
index 5ef52c0f1ab6..840a16b6d499 100644
--- a/PubSub/samples/V1/SubscriberClient/delete_snapshot.php
+++ b/PubSub/samples/V1/SubscriberClient/delete_snapshot.php
@@ -38,7 +38,7 @@
  * created with the same name, but the new one has no association with the old
  * snapshot or its subscription, unless the same subscription is specified.
  *
- * @param string $formattedSnapshot Identifier. The name of the snapshot to delete.
+ * @param string $formattedSnapshot The name of the snapshot to delete.
  *                                  Format is `projects/{project}/snapshots/{snap}`. Please see
  *                                  {@see SubscriberClient::snapshotName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/SubscriberClient/delete_subscription.php b/PubSub/samples/V1/SubscriberClient/delete_subscription.php
index 968f21385911..1627fca628a0 100644
--- a/PubSub/samples/V1/SubscriberClient/delete_subscription.php
+++ b/PubSub/samples/V1/SubscriberClient/delete_subscription.php
@@ -34,7 +34,7 @@
  * the same name, but the new one has no association with the old
  * subscription or its topic unless the same topic is specified.
  *
- * @param string $formattedSubscription Identifier. The subscription to delete.
+ * @param string $formattedSubscription The subscription to delete.
  *                                      Format is `projects/{project}/subscriptions/{sub}`. Please see
  *                                      {@see SubscriberClient::subscriptionName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/SubscriberClient/get_snapshot.php b/PubSub/samples/V1/SubscriberClient/get_snapshot.php
index 583e700e51a8..10d3da8b2986 100644
--- a/PubSub/samples/V1/SubscriberClient/get_snapshot.php
+++ b/PubSub/samples/V1/SubscriberClient/get_snapshot.php
@@ -35,7 +35,7 @@
  * set the acknowledgment state of messages in an existing subscription to the
  * state captured by a snapshot.
  *
- * @param string $formattedSnapshot Identifier. The name of the snapshot to get.
+ * @param string $formattedSnapshot The name of the snapshot to get.
  *                                  Format is `projects/{project}/snapshots/{snap}`. Please see
  *                                  {@see SubscriberClient::snapshotName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/SubscriberClient/get_subscription.php b/PubSub/samples/V1/SubscriberClient/get_subscription.php
index 2006b4edcfa1..174e7918b241 100644
--- a/PubSub/samples/V1/SubscriberClient/get_subscription.php
+++ b/PubSub/samples/V1/SubscriberClient/get_subscription.php
@@ -31,7 +31,7 @@
 /**
  * Gets the configuration details of a subscription.
  *
- * @param string $formattedSubscription Identifier. The name of the subscription to get.
+ * @param string $formattedSubscription The name of the subscription to get.
  *                                      Format is `projects/{project}/subscriptions/{sub}`. Please see
  *                                      {@see SubscriberClient::subscriptionName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/SubscriberClient/list_snapshots.php b/PubSub/samples/V1/SubscriberClient/list_snapshots.php
index 87c1f20db4cc..fe1b3d5dbae9 100644
--- a/PubSub/samples/V1/SubscriberClient/list_snapshots.php
+++ b/PubSub/samples/V1/SubscriberClient/list_snapshots.php
@@ -36,7 +36,7 @@
  * the acknowledgment state of messages in an existing subscription to the
  * state captured by a snapshot.
  *
- * @param string $formattedProject Identifier. The name of the project in which to list snapshots.
+ * @param string $formattedProject The name of the project in which to list snapshots.
  *                                 Format is `projects/{project-id}`. Please see
  *                                 {@see SubscriberClient::projectName()} for help formatting this field.
  */
diff --git a/PubSub/samples/V1/SubscriberClient/list_subscriptions.php b/PubSub/samples/V1/SubscriberClient/list_subscriptions.php
index 88a15cb2eb25..be3e279d7324 100644
--- a/PubSub/samples/V1/SubscriberClient/list_subscriptions.php
+++ b/PubSub/samples/V1/SubscriberClient/list_subscriptions.php
@@ -32,8 +32,8 @@
 /**
  * Lists matching subscriptions.
  *
- * @param string $formattedProject Identifier. The name of the project in which to list
- *                                 subscriptions. Format is `projects/{project-id}`. Please see
+ * @param string $formattedProject The name of the project in which to list subscriptions.
+ *                                 Format is `projects/{project-id}`. Please see
  *                                 {@see SubscriberClient::projectName()} for help formatting this field.
  */
 function list_subscriptions_sample(string $formattedProject): void
diff --git a/PubSub/src/V1/AIInference.php b/PubSub/src/V1/AIInference.php
new file mode 100644
index 000000000000..71614904a6cc
--- /dev/null
+++ b/PubSub/src/V1/AIInference.php
@@ -0,0 +1,175 @@
+<?php
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/pubsub/v1/pubsub.proto
+
+namespace Google\Cloud\PubSub\V1;
+
+use Google\Protobuf\Internal\GPBType;
+use Google\Protobuf\Internal\RepeatedField;
+use Google\Protobuf\Internal\GPBUtil;
+
+/**
+ * Configuration for making inference requests against Vertex AI models.
+ *
+ * Generated from protobuf message <code>google.pubsub.v1.AIInference</code>
+ */
+class AIInference extends \Google\Protobuf\Internal\Message
+{
+    /**
+     * Required. An endpoint to a Vertex AI model of the form
+     * `projects/{project}/locations/{location}/endpoints/{endpoint}` or
+     * `projects/{project}/locations/{location}/publishers/{publisher}/models/{model}`.
+     * Vertex AI API requests will be sent to this endpoint.
+     *
+     * Generated from protobuf field <code>string endpoint = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     */
+    private $endpoint = '';
+    /**
+     * Optional. The service account to use to make prediction requests against
+     * endpoints. The resource creator or updater that specifies this field must
+     * have `iam.serviceAccounts.actAs` permission on the service account. If not
+     * specified, the Pub/Sub [service
+     * agent]({$universe.dns_names.final_documentation_domain}/iam/docs/service-agents),
+     * service-{project_number}&#64;gcp-sa-pubsub.iam.gserviceaccount.com, is used.
+     *
+     * Generated from protobuf field <code>string service_account_email = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     */
+    private $service_account_email = '';
+    protected $inference_mode;
+
+    /**
+     * Constructor.
+     *
+     * @param array $data {
+     *     Optional. Data for populating the Message object.
+     *
+     *     @type string $endpoint
+     *           Required. An endpoint to a Vertex AI model of the form
+     *           `projects/{project}/locations/{location}/endpoints/{endpoint}` or
+     *           `projects/{project}/locations/{location}/publishers/{publisher}/models/{model}`.
+     *           Vertex AI API requests will be sent to this endpoint.
+     *     @type \Google\Cloud\PubSub\V1\AIInference\UnstructuredInference $unstructured_inference
+     *           Optional. Requests and responses can be any arbitrary JSON object.
+     *     @type string $service_account_email
+     *           Optional. The service account to use to make prediction requests against
+     *           endpoints. The resource creator or updater that specifies this field must
+     *           have `iam.serviceAccounts.actAs` permission on the service account. If not
+     *           specified, the Pub/Sub [service
+     *           agent]({$universe.dns_names.final_documentation_domain}/iam/docs/service-agents),
+     *           service-{project_number}&#64;gcp-sa-pubsub.iam.gserviceaccount.com, is used.
+     * }
+     */
+    public function __construct($data = NULL) {
+        \GPBMetadata\Google\Pubsub\V1\Pubsub::initOnce();
+        parent::__construct($data);
+    }
+
+    /**
+     * Required. An endpoint to a Vertex AI model of the form
+     * `projects/{project}/locations/{location}/endpoints/{endpoint}` or
+     * `projects/{project}/locations/{location}/publishers/{publisher}/models/{model}`.
+     * Vertex AI API requests will be sent to this endpoint.
+     *
+     * Generated from protobuf field <code>string endpoint = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * @return string
+     */
+    public function getEndpoint()
+    {
+        return $this->endpoint;
+    }
+
+    /**
+     * Required. An endpoint to a Vertex AI model of the form
+     * `projects/{project}/locations/{location}/endpoints/{endpoint}` or
+     * `projects/{project}/locations/{location}/publishers/{publisher}/models/{model}`.
+     * Vertex AI API requests will be sent to this endpoint.
+     *
+     * Generated from protobuf field <code>string endpoint = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * @param string $var
+     * @return $this
+     */
+    public function setEndpoint($var)
+    {
+        GPBUtil::checkString($var, True);
+        $this->endpoint = $var;
+
+        return $this;
+    }
+
+    /**
+     * Optional. Requests and responses can be any arbitrary JSON object.
+     *
+     * Generated from protobuf field <code>.google.pubsub.v1.AIInference.UnstructuredInference unstructured_inference = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return \Google\Cloud\PubSub\V1\AIInference\UnstructuredInference|null
+     */
+    public function getUnstructuredInference()
+    {
+        return $this->readOneof(2);
+    }
+
+    public function hasUnstructuredInference()
+    {
+        return $this->hasOneof(2);
+    }
+
+    /**
+     * Optional. Requests and responses can be any arbitrary JSON object.
+     *
+     * Generated from protobuf field <code>.google.pubsub.v1.AIInference.UnstructuredInference unstructured_inference = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param \Google\Cloud\PubSub\V1\AIInference\UnstructuredInference $var
+     * @return $this
+     */
+    public function setUnstructuredInference($var)
+    {
+        GPBUtil::checkMessage($var, \Google\Cloud\PubSub\V1\AIInference\UnstructuredInference::class);
+        $this->writeOneof(2, $var);
+
+        return $this;
+    }
+
+    /**
+     * Optional. The service account to use to make prediction requests against
+     * endpoints. The resource creator or updater that specifies this field must
+     * have `iam.serviceAccounts.actAs` permission on the service account. If not
+     * specified, the Pub/Sub [service
+     * agent]({$universe.dns_names.final_documentation_domain}/iam/docs/service-agents),
+     * service-{project_number}&#64;gcp-sa-pubsub.iam.gserviceaccount.com, is used.
+     *
+     * Generated from protobuf field <code>string service_account_email = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return string
+     */
+    public function getServiceAccountEmail()
+    {
+        return $this->service_account_email;
+    }
+
+    /**
+     * Optional. The service account to use to make prediction requests against
+     * endpoints. The resource creator or updater that specifies this field must
+     * have `iam.serviceAccounts.actAs` permission on the service account. If not
+     * specified, the Pub/Sub [service
+     * agent]({$universe.dns_names.final_documentation_domain}/iam/docs/service-agents),
+     * service-{project_number}&#64;gcp-sa-pubsub.iam.gserviceaccount.com, is used.
+     *
+     * Generated from protobuf field <code>string service_account_email = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param string $var
+     * @return $this
+     */
+    public function setServiceAccountEmail($var)
+    {
+        GPBUtil::checkString($var, True);
+        $this->service_account_email = $var;
+
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getInferenceMode()
+    {
+        return $this->whichOneof("inference_mode");
+    }
+
+}
+
diff --git a/PubSub/src/V1/AIInference/UnstructuredInference.php b/PubSub/src/V1/AIInference/UnstructuredInference.php
new file mode 100644
index 000000000000..b8ed2398b818
--- /dev/null
+++ b/PubSub/src/V1/AIInference/UnstructuredInference.php
@@ -0,0 +1,86 @@
+<?php
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/pubsub/v1/pubsub.proto
+
+namespace Google\Cloud\PubSub\V1\AIInference;
+
+use Google\Protobuf\Internal\GPBType;
+use Google\Protobuf\Internal\RepeatedField;
+use Google\Protobuf\Internal\GPBUtil;
+
+/**
+ * Configuration for making inferences using arbitrary JSON payloads.
+ *
+ * Generated from protobuf message <code>google.pubsub.v1.AIInference.UnstructuredInference</code>
+ */
+class UnstructuredInference extends \Google\Protobuf\Internal\Message
+{
+    /**
+     * Optional. A parameters object to be included in each inference request.
+     * The parameters object is combined with the data field of the Pub/Sub
+     * message to form the inference request.
+     *
+     * Generated from protobuf field <code>.google.protobuf.Struct parameters = 1 [(.google.api.field_behavior) = OPTIONAL];</code>
+     */
+    private $parameters = null;
+
+    /**
+     * Constructor.
+     *
+     * @param array $data {
+     *     Optional. Data for populating the Message object.
+     *
+     *     @type \Google\Protobuf\Struct $parameters
+     *           Optional. A parameters object to be included in each inference request.
+     *           The parameters object is combined with the data field of the Pub/Sub
+     *           message to form the inference request.
+     * }
+     */
+    public function __construct($data = NULL) {
+        \GPBMetadata\Google\Pubsub\V1\Pubsub::initOnce();
+        parent::__construct($data);
+    }
+
+    /**
+     * Optional. A parameters object to be included in each inference request.
+     * The parameters object is combined with the data field of the Pub/Sub
+     * message to form the inference request.
+     *
+     * Generated from protobuf field <code>.google.protobuf.Struct parameters = 1 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return \Google\Protobuf\Struct|null
+     */
+    public function getParameters()
+    {
+        return $this->parameters;
+    }
+
+    public function hasParameters()
+    {
+        return isset($this->parameters);
+    }
+
+    public function clearParameters()
+    {
+        unset($this->parameters);
+    }
+
+    /**
+     * Optional. A parameters object to be included in each inference request.
+     * The parameters object is combined with the data field of the Pub/Sub
+     * message to form the inference request.
+     *
+     * Generated from protobuf field <code>.google.protobuf.Struct parameters = 1 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param \Google\Protobuf\Struct $var
+     * @return $this
+     */
+    public function setParameters($var)
+    {
+        GPBUtil::checkMessage($var, \Google\Protobuf\Struct::class);
+        $this->parameters = $var;
+
+        return $this;
+    }
+
+}
+
+
diff --git a/PubSub/src/V1/BigQueryConfig/State.php b/PubSub/src/V1/BigQueryConfig/State.php
index f084d317b1a0..dd4d327f5b94 100644
--- a/PubSub/src/V1/BigQueryConfig/State.php
+++ b/PubSub/src/V1/BigQueryConfig/State.php
@@ -55,6 +55,14 @@ class State
      * Generated from protobuf enum <code>IN_TRANSIT_LOCATION_RESTRICTION = 5;</code>
      */
     const IN_TRANSIT_LOCATION_RESTRICTION = 5;
+    /**
+     * Cannot write to the BigQuery table because the table is not in the same
+     * location as where Vertex AI models used in `message_transform`s are
+     * deployed.
+     *
+     * Generated from protobuf enum <code>VERTEX_AI_LOCATION_RESTRICTION = 6;</code>
+     */
+    const VERTEX_AI_LOCATION_RESTRICTION = 6;
 
     private static $valueToName = [
         self::STATE_UNSPECIFIED => 'STATE_UNSPECIFIED',
@@ -63,6 +71,7 @@ class State
         self::NOT_FOUND => 'NOT_FOUND',
         self::SCHEMA_MISMATCH => 'SCHEMA_MISMATCH',
         self::IN_TRANSIT_LOCATION_RESTRICTION => 'IN_TRANSIT_LOCATION_RESTRICTION',
+        self::VERTEX_AI_LOCATION_RESTRICTION => 'VERTEX_AI_LOCATION_RESTRICTION',
     ];
 
     public static function name($value)
diff --git a/PubSub/src/V1/CloudStorageConfig/State.php b/PubSub/src/V1/CloudStorageConfig/State.php
index a25e92b39016..9a074b53c1ec 100644
--- a/PubSub/src/V1/CloudStorageConfig/State.php
+++ b/PubSub/src/V1/CloudStorageConfig/State.php
@@ -52,6 +52,14 @@ class State
      * Generated from protobuf enum <code>SCHEMA_MISMATCH = 5;</code>
      */
     const SCHEMA_MISMATCH = 5;
+    /**
+     * Cannot write to the Cloud Storage bucket because the bucket is not in the
+     * same location as where Vertex AI models used in `message_transform`s are
+     * deployed.
+     *
+     * Generated from protobuf enum <code>VERTEX_AI_LOCATION_RESTRICTION = 6;</code>
+     */
+    const VERTEX_AI_LOCATION_RESTRICTION = 6;
 
     private static $valueToName = [
         self::STATE_UNSPECIFIED => 'STATE_UNSPECIFIED',
@@ -60,6 +68,7 @@ class State
         self::NOT_FOUND => 'NOT_FOUND',
         self::IN_TRANSIT_LOCATION_RESTRICTION => 'IN_TRANSIT_LOCATION_RESTRICTION',
         self::SCHEMA_MISMATCH => 'SCHEMA_MISMATCH',
+        self::VERTEX_AI_LOCATION_RESTRICTION => 'VERTEX_AI_LOCATION_RESTRICTION',
     ];
 
     public static function name($value)
diff --git a/PubSub/src/V1/CreateSnapshotRequest.php b/PubSub/src/V1/CreateSnapshotRequest.php
index 597bd15a2014..59169c3e2460 100644
--- a/PubSub/src/V1/CreateSnapshotRequest.php
+++ b/PubSub/src/V1/CreateSnapshotRequest.php
@@ -16,14 +16,14 @@
 class CreateSnapshotRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. User-provided name for this snapshot. If the name is
-     * not provided in the request, the server will assign a random name for this
-     * snapshot on the same project as the subscription. Note that for REST API
-     * requests, you must specify a name.  See the [resource name
+     * Required. User-provided name for this snapshot. If the name is not provided
+     * in the request, the server will assign a random name for this snapshot on
+     * the same project as the subscription. Note that for REST API requests, you
+     * must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $name = '';
     /**
@@ -60,10 +60,10 @@ class CreateSnapshotRequest extends \Google\Protobuf\Internal\Message
     private $tags;
 
     /**
-     * @param string $name         Required. Identifier. User-provided name for this snapshot. If the name is
-     *                             not provided in the request, the server will assign a random name for this
-     *                             snapshot on the same project as the subscription. Note that for REST API
-     *                             requests, you must specify a name.  See the [resource name
+     * @param string $name         Required. User-provided name for this snapshot. If the name is not provided
+     *                             in the request, the server will assign a random name for this snapshot on
+     *                             the same project as the subscription. Note that for REST API requests, you
+     *                             must specify a name.  See the [resource name
      *                             rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      *                             Format is `projects/{project}/snapshots/{snap}`. Please see
      *                             {@see SubscriberClient::snapshotName()} for help formatting this field.
@@ -96,10 +96,10 @@ public static function build(string $name, string $subscription): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $name
-     *           Required. Identifier. User-provided name for this snapshot. If the name is
-     *           not provided in the request, the server will assign a random name for this
-     *           snapshot on the same project as the subscription. Note that for REST API
-     *           requests, you must specify a name.  See the [resource name
+     *           Required. User-provided name for this snapshot. If the name is not provided
+     *           in the request, the server will assign a random name for this snapshot on
+     *           the same project as the subscription. Note that for REST API requests, you
+     *           must specify a name.  See the [resource name
      *           rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      *           Format is `projects/{project}/snapshots/{snap}`.
      *     @type string $subscription
@@ -130,14 +130,14 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. User-provided name for this snapshot. If the name is
-     * not provided in the request, the server will assign a random name for this
-     * snapshot on the same project as the subscription. Note that for REST API
-     * requests, you must specify a name.  See the [resource name
+     * Required. User-provided name for this snapshot. If the name is not provided
+     * in the request, the server will assign a random name for this snapshot on
+     * the same project as the subscription. Note that for REST API requests, you
+     * must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getName()
@@ -146,14 +146,14 @@ public function getName()
     }
 
     /**
-     * Required. Identifier. User-provided name for this snapshot. If the name is
-     * not provided in the request, the server will assign a random name for this
-     * snapshot on the same project as the subscription. Note that for REST API
-     * requests, you must specify a name.  See the [resource name
+     * Required. User-provided name for this snapshot. If the name is not provided
+     * in the request, the server will assign a random name for this snapshot on
+     * the same project as the subscription. Note that for REST API requests, you
+     * must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/DeleteSnapshotRequest.php b/PubSub/src/V1/DeleteSnapshotRequest.php
index 27772705ead6..af2313427339 100644
--- a/PubSub/src/V1/DeleteSnapshotRequest.php
+++ b/PubSub/src/V1/DeleteSnapshotRequest.php
@@ -16,15 +16,15 @@
 class DeleteSnapshotRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the snapshot to delete.
+     * Required. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $snapshot = '';
 
     /**
-     * @param string $snapshot Required. Identifier. The name of the snapshot to delete.
+     * @param string $snapshot Required. The name of the snapshot to delete.
      *                         Format is `projects/{project}/snapshots/{snap}`. Please see
      *                         {@see SubscriberClient::snapshotName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $snapshot): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $snapshot
-     *           Required. Identifier. The name of the snapshot to delete.
+     *           Required. The name of the snapshot to delete.
      *           Format is `projects/{project}/snapshots/{snap}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the snapshot to delete.
+     * Required. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getSnapshot()
@@ -67,10 +67,10 @@ public function getSnapshot()
     }
 
     /**
-     * Required. Identifier. The name of the snapshot to delete.
+     * Required. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/DeleteSubscriptionRequest.php b/PubSub/src/V1/DeleteSubscriptionRequest.php
index 289de92aedb0..24bd06654d42 100644
--- a/PubSub/src/V1/DeleteSubscriptionRequest.php
+++ b/PubSub/src/V1/DeleteSubscriptionRequest.php
@@ -16,15 +16,15 @@
 class DeleteSubscriptionRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The subscription to delete.
+     * Required. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $subscription = '';
 
     /**
-     * @param string $subscription Required. Identifier. The subscription to delete.
+     * @param string $subscription Required. The subscription to delete.
      *                             Format is `projects/{project}/subscriptions/{sub}`. Please see
      *                             {@see SubscriberClient::subscriptionName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $subscription): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $subscription
-     *           Required. Identifier. The subscription to delete.
+     *           Required. The subscription to delete.
      *           Format is `projects/{project}/subscriptions/{sub}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The subscription to delete.
+     * Required. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getSubscription()
@@ -67,10 +67,10 @@ public function getSubscription()
     }
 
     /**
-     * Required. Identifier. The subscription to delete.
+     * Required. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/DeleteTopicRequest.php b/PubSub/src/V1/DeleteTopicRequest.php
index b4e811433423..a0099885c511 100644
--- a/PubSub/src/V1/DeleteTopicRequest.php
+++ b/PubSub/src/V1/DeleteTopicRequest.php
@@ -16,15 +16,15 @@
 class DeleteTopicRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. Name of the topic to delete.
+     * Required. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $topic = '';
 
     /**
-     * @param string $topic Required. Identifier. Name of the topic to delete.
+     * @param string $topic Required. Name of the topic to delete.
      *                      Format is `projects/{project}/topics/{topic}`. Please see
      *                      {@see PublisherClient::topicName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $topic): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $topic
-     *           Required. Identifier. Name of the topic to delete.
+     *           Required. Name of the topic to delete.
      *           Format is `projects/{project}/topics/{topic}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. Name of the topic to delete.
+     * Required. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getTopic()
@@ -67,10 +67,10 @@ public function getTopic()
     }
 
     /**
-     * Required. Identifier. Name of the topic to delete.
+     * Required. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/GetSnapshotRequest.php b/PubSub/src/V1/GetSnapshotRequest.php
index 34e32849db9d..3e4288099d5c 100644
--- a/PubSub/src/V1/GetSnapshotRequest.php
+++ b/PubSub/src/V1/GetSnapshotRequest.php
@@ -16,15 +16,15 @@
 class GetSnapshotRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the snapshot to get.
+     * Required. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $snapshot = '';
 
     /**
-     * @param string $snapshot Required. Identifier. The name of the snapshot to get.
+     * @param string $snapshot Required. The name of the snapshot to get.
      *                         Format is `projects/{project}/snapshots/{snap}`. Please see
      *                         {@see SubscriberClient::snapshotName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $snapshot): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $snapshot
-     *           Required. Identifier. The name of the snapshot to get.
+     *           Required. The name of the snapshot to get.
      *           Format is `projects/{project}/snapshots/{snap}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the snapshot to get.
+     * Required. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getSnapshot()
@@ -67,10 +67,10 @@ public function getSnapshot()
     }
 
     /**
-     * Required. Identifier. The name of the snapshot to get.
+     * Required. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      *
-     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/GetSubscriptionRequest.php b/PubSub/src/V1/GetSubscriptionRequest.php
index 5def17049520..131b199a5fdc 100644
--- a/PubSub/src/V1/GetSubscriptionRequest.php
+++ b/PubSub/src/V1/GetSubscriptionRequest.php
@@ -16,15 +16,15 @@
 class GetSubscriptionRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the subscription to get.
+     * Required. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $subscription = '';
 
     /**
-     * @param string $subscription Required. Identifier. The name of the subscription to get.
+     * @param string $subscription Required. The name of the subscription to get.
      *                             Format is `projects/{project}/subscriptions/{sub}`. Please see
      *                             {@see SubscriberClient::subscriptionName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $subscription): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $subscription
-     *           Required. Identifier. The name of the subscription to get.
+     *           Required. The name of the subscription to get.
      *           Format is `projects/{project}/subscriptions/{sub}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the subscription to get.
+     * Required. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getSubscription()
@@ -67,10 +67,10 @@ public function getSubscription()
     }
 
     /**
-     * Required. Identifier. The name of the subscription to get.
+     * Required. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      *
-     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/GetTopicRequest.php b/PubSub/src/V1/GetTopicRequest.php
index 0bdcb08a20a6..a35801bd03f6 100644
--- a/PubSub/src/V1/GetTopicRequest.php
+++ b/PubSub/src/V1/GetTopicRequest.php
@@ -16,15 +16,15 @@
 class GetTopicRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the topic to get.
+     * Required. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $topic = '';
 
     /**
-     * @param string $topic Required. Identifier. The name of the topic to get.
+     * @param string $topic Required. The name of the topic to get.
      *                      Format is `projects/{project}/topics/{topic}`. Please see
      *                      {@see PublisherClient::topicName()} for help formatting this field.
      *
@@ -45,7 +45,7 @@ public static function build(string $topic): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $topic
-     *           Required. Identifier. The name of the topic to get.
+     *           Required. The name of the topic to get.
      *           Format is `projects/{project}/topics/{topic}`.
      * }
      */
@@ -55,10 +55,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the topic to get.
+     * Required. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getTopic()
@@ -67,10 +67,10 @@ public function getTopic()
     }
 
     /**
-     * Required. Identifier. The name of the topic to get.
+     * Required. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/ListSnapshotsRequest.php b/PubSub/src/V1/ListSnapshotsRequest.php
index b6b35c1a4210..1082fedc4d40 100644
--- a/PubSub/src/V1/ListSnapshotsRequest.php
+++ b/PubSub/src/V1/ListSnapshotsRequest.php
@@ -16,10 +16,10 @@
 class ListSnapshotsRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the project in which to list snapshots.
+     * Required. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $project = '';
     /**
@@ -38,7 +38,7 @@ class ListSnapshotsRequest extends \Google\Protobuf\Internal\Message
     private $page_token = '';
 
     /**
-     * @param string $project Required. Identifier. The name of the project in which to list snapshots.
+     * @param string $project Required. The name of the project in which to list snapshots.
      *                        Format is `projects/{project-id}`. Please see
      *                        {@see SubscriberClient::projectName()} for help formatting this field.
      *
@@ -59,7 +59,7 @@ public static function build(string $project): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $project
-     *           Required. Identifier. The name of the project in which to list snapshots.
+     *           Required. The name of the project in which to list snapshots.
      *           Format is `projects/{project-id}`.
      *     @type int $page_size
      *           Optional. Maximum number of snapshots to return.
@@ -75,10 +75,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list snapshots.
+     * Required. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getProject()
@@ -87,10 +87,10 @@ public function getProject()
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list snapshots.
+     * Required. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/ListSubscriptionsRequest.php b/PubSub/src/V1/ListSubscriptionsRequest.php
index 06a99ff788e6..56246538dc0d 100644
--- a/PubSub/src/V1/ListSubscriptionsRequest.php
+++ b/PubSub/src/V1/ListSubscriptionsRequest.php
@@ -16,10 +16,10 @@
 class ListSubscriptionsRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the project in which to list
-     * subscriptions. Format is `projects/{project-id}`.
+     * Required. The name of the project in which to list subscriptions.
+     * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $project = '';
     /**
@@ -38,8 +38,8 @@ class ListSubscriptionsRequest extends \Google\Protobuf\Internal\Message
     private $page_token = '';
 
     /**
-     * @param string $project Required. Identifier. The name of the project in which to list
-     *                        subscriptions. Format is `projects/{project-id}`. Please see
+     * @param string $project Required. The name of the project in which to list subscriptions.
+     *                        Format is `projects/{project-id}`. Please see
      *                        {@see SubscriberClient::projectName()} for help formatting this field.
      *
      * @return \Google\Cloud\PubSub\V1\ListSubscriptionsRequest
@@ -59,8 +59,8 @@ public static function build(string $project): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $project
-     *           Required. Identifier. The name of the project in which to list
-     *           subscriptions. Format is `projects/{project-id}`.
+     *           Required. The name of the project in which to list subscriptions.
+     *           Format is `projects/{project-id}`.
      *     @type int $page_size
      *           Optional. Maximum number of subscriptions to return.
      *     @type string $page_token
@@ -75,10 +75,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list
-     * subscriptions. Format is `projects/{project-id}`.
+     * Required. The name of the project in which to list subscriptions.
+     * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getProject()
@@ -87,10 +87,10 @@ public function getProject()
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list
-     * subscriptions. Format is `projects/{project-id}`.
+     * Required. The name of the project in which to list subscriptions.
+     * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/ListTopicsRequest.php b/PubSub/src/V1/ListTopicsRequest.php
index fe8efa7a77cb..d54385c94d37 100644
--- a/PubSub/src/V1/ListTopicsRequest.php
+++ b/PubSub/src/V1/ListTopicsRequest.php
@@ -16,10 +16,10 @@
 class ListTopicsRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The name of the project in which to list topics.
+     * Required. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $project = '';
     /**
@@ -38,7 +38,7 @@ class ListTopicsRequest extends \Google\Protobuf\Internal\Message
     private $page_token = '';
 
     /**
-     * @param string $project Required. Identifier. The name of the project in which to list topics.
+     * @param string $project Required. The name of the project in which to list topics.
      *                        Format is `projects/{project-id}`. Please see
      *                        {@see PublisherClient::projectName()} for help formatting this field.
      *
@@ -59,7 +59,7 @@ public static function build(string $project): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $project
-     *           Required. Identifier. The name of the project in which to list topics.
+     *           Required. The name of the project in which to list topics.
      *           Format is `projects/{project-id}`.
      *     @type int $page_size
      *           Optional. Maximum number of topics to return.
@@ -75,10 +75,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list topics.
+     * Required. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getProject()
@@ -87,10 +87,10 @@ public function getProject()
     }
 
     /**
-     * Required. Identifier. The name of the project in which to list topics.
+     * Required. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      *
-     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/MessageTransform.php b/PubSub/src/V1/MessageTransform.php
index 6415d3eb5778..25202b7ef1b6 100644
--- a/PubSub/src/V1/MessageTransform.php
+++ b/PubSub/src/V1/MessageTransform.php
@@ -41,6 +41,10 @@ class MessageTransform extends \Google\Protobuf\Internal\Message
      *     @type \Google\Cloud\PubSub\V1\JavaScriptUDF $javascript_udf
      *           Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
      *           are specified on a resource, each must have a unique `function_name`.
+     *     @type \Google\Cloud\PubSub\V1\AIInference $ai_inference
+     *           Optional. AI Inference. Specifies the Vertex AI endpoint that inference
+     *           requests built from the Pub/Sub message data and provided parameters will
+     *           be sent to.
      *     @type bool $enabled
      *           Optional. This field is deprecated, use the `disabled` field to disable
      *           transforms.
@@ -87,6 +91,41 @@ public function setJavascriptUdf($var)
         return $this;
     }
 
+    /**
+     * Optional. AI Inference. Specifies the Vertex AI endpoint that inference
+     * requests built from the Pub/Sub message data and provided parameters will
+     * be sent to.
+     *
+     * Generated from protobuf field <code>.google.pubsub.v1.AIInference ai_inference = 6 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return \Google\Cloud\PubSub\V1\AIInference|null
+     */
+    public function getAiInference()
+    {
+        return $this->readOneof(6);
+    }
+
+    public function hasAiInference()
+    {
+        return $this->hasOneof(6);
+    }
+
+    /**
+     * Optional. AI Inference. Specifies the Vertex AI endpoint that inference
+     * requests built from the Pub/Sub message data and provided parameters will
+     * be sent to.
+     *
+     * Generated from protobuf field <code>.google.pubsub.v1.AIInference ai_inference = 6 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param \Google\Cloud\PubSub\V1\AIInference $var
+     * @return $this
+     */
+    public function setAiInference($var)
+    {
+        GPBUtil::checkMessage($var, \Google\Cloud\PubSub\V1\AIInference::class);
+        $this->writeOneof(6, $var);
+
+        return $this;
+    }
+
     /**
      * Optional. This field is deprecated, use the `disabled` field to disable
      * transforms.
diff --git a/PubSub/src/V1/PublishRequest.php b/PubSub/src/V1/PublishRequest.php
index 83d16502c70b..b33ef4dbf990 100644
--- a/PubSub/src/V1/PublishRequest.php
+++ b/PubSub/src/V1/PublishRequest.php
@@ -16,10 +16,10 @@
 class PublishRequest extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Required. Identifier. The messages in the request will be published on this
-     * topic. Format is `projects/{project}/topics/{topic}`.
+     * Required. The messages in the request will be published on this topic.
+     * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     private $topic = '';
     /**
@@ -30,8 +30,8 @@ class PublishRequest extends \Google\Protobuf\Internal\Message
     private $messages;
 
     /**
-     * @param string                                  $topic    Required. Identifier. The messages in the request will be published on this
-     *                                                          topic. Format is `projects/{project}/topics/{topic}`. Please see
+     * @param string                                  $topic    Required. The messages in the request will be published on this topic.
+     *                                                          Format is `projects/{project}/topics/{topic}`. Please see
      *                                                          {@see PublisherClient::topicName()} for help formatting this field.
      * @param \Google\Cloud\PubSub\V1\PubsubMessage[] $messages Required. The messages to publish.
      *
@@ -53,8 +53,8 @@ public static function build(string $topic, array $messages): self
      *     Optional. Data for populating the Message object.
      *
      *     @type string $topic
-     *           Required. Identifier. The messages in the request will be published on this
-     *           topic. Format is `projects/{project}/topics/{topic}`.
+     *           Required. The messages in the request will be published on this topic.
+     *           Format is `projects/{project}/topics/{topic}`.
      *     @type array<\Google\Cloud\PubSub\V1\PubsubMessage>|\Google\Protobuf\Internal\RepeatedField $messages
      *           Required. The messages to publish.
      * }
@@ -65,10 +65,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. Identifier. The messages in the request will be published on this
-     * topic. Format is `projects/{project}/topics/{topic}`.
+     * Required. The messages in the request will be published on this topic.
+     * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getTopic()
@@ -77,10 +77,10 @@ public function getTopic()
     }
 
     /**
-     * Required. Identifier. The messages in the request will be published on this
-     * topic. Format is `projects/{project}/topics/{topic}`.
+     * Required. The messages in the request will be published on this topic.
+     * Format is `projects/{project}/topics/{topic}`.
      *
-     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/PubSub/src/V1/Subscription.php b/PubSub/src/V1/Subscription.php
index 790086b6b7c6..0f755415bc87 100644
--- a/PubSub/src/V1/Subscription.php
+++ b/PubSub/src/V1/Subscription.php
@@ -206,7 +206,7 @@ class Subscription extends \Google\Protobuf\Internal\Message
     private $state = 0;
     /**
      * Output only. Information about the associated Analytics Hub subscription.
-     * Only set if the subscritpion is created by Analytics Hub.
+     * Only set if the subscription is created by Analytics Hub.
      *
      * Generated from protobuf field <code>.google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfo analytics_hub_subscription_info = 23 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
@@ -400,7 +400,7 @@ public static function build(string $name, string $topic, \Google\Cloud\PubSub\V
      *           subscription can receive messages.
      *     @type \Google\Cloud\PubSub\V1\Subscription\AnalyticsHubSubscriptionInfo $analytics_hub_subscription_info
      *           Output only. Information about the associated Analytics Hub subscription.
-     *           Only set if the subscritpion is created by Analytics Hub.
+     *           Only set if the subscription is created by Analytics Hub.
      *     @type array<\Google\Cloud\PubSub\V1\MessageTransform>|\Google\Protobuf\Internal\RepeatedField $message_transforms
      *           Optional. Transforms to be applied to messages before they are delivered to
      *           subscribers. Transforms are applied in the order specified.
@@ -1126,7 +1126,7 @@ public function setState($var)
 
     /**
      * Output only. Information about the associated Analytics Hub subscription.
-     * Only set if the subscritpion is created by Analytics Hub.
+     * Only set if the subscription is created by Analytics Hub.
      *
      * Generated from protobuf field <code>.google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfo analytics_hub_subscription_info = 23 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return \Google\Cloud\PubSub\V1\Subscription\AnalyticsHubSubscriptionInfo|null
@@ -1148,7 +1148,7 @@ public function clearAnalyticsHubSubscriptionInfo()
 
     /**
      * Output only. Information about the associated Analytics Hub subscription.
-     * Only set if the subscritpion is created by Analytics Hub.
+     * Only set if the subscription is created by Analytics Hub.
      *
      * Generated from protobuf field <code>.google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfo analytics_hub_subscription_info = 23 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param \Google\Cloud\PubSub\V1\Subscription\AnalyticsHubSubscriptionInfo $var