diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/AIProjectsModelFactory.cs b/sdk/ai/Azure.AI.Projects/src/Generated/AIProjectsModelFactory.cs
index c4044af53ced..ca30fab8a036 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/AIProjectsModelFactory.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/AIProjectsModelFactory.cs
@@ -64,9 +64,10 @@ public static SystemData SystemData(DateTimeOffset? createdAt = null, string cre
         /// <param name="data"> Data for evaluation. </param>
         /// <param name="description"> Description of the evaluation. It can be used to store additional information about the evaluation and is mutable. </param>
         /// <param name="systemData"> Metadata containing createdBy and modifiedBy information. </param>
-        /// <param name="provisioningStatus"> Status of the evaluation. It is set by service and is read-only. </param>
+        /// <param name="provisioningState"> Provisioning State of the evaluation. It is set by service and is read-only. </param>
         /// <param name="tags"> Evaluation's tags. Unlike properties, tags are fully mutable. </param>
         /// <param name="properties"> Evaluation's properties. Unlike tags, properties are add-only. Once added, a property cannot be removed. </param>
+        /// <param name="isEnabled"> Enabled status of the evaluation. It is set by service and is read-only. </param>
         /// <param name="evaluators"> Evaluators to be used for the evaluation. </param>
         /// <param name="trigger">
         /// Trigger for the evaluation.
@@ -74,7 +75,7 @@ public static SystemData SystemData(DateTimeOffset? createdAt = null, string cre
         /// The available derived classes include <see cref="CronTrigger"/> and <see cref="RecurrenceTrigger"/>.
         /// </param>
         /// <returns> A new <see cref="Projects.EvaluationSchedule"/> instance for mocking. </returns>
-        public static EvaluationSchedule EvaluationSchedule(string name = null, ApplicationInsightsConfiguration data = null, string description = null, SystemData systemData = null, string provisioningStatus = null, IDictionary<string, string> tags = null, IDictionary<string, string> properties = null, IDictionary<string, EvaluatorConfiguration> evaluators = null, Trigger trigger = null)
+        public static EvaluationSchedule EvaluationSchedule(string name = null, ApplicationInsightsConfiguration data = null, string description = null, SystemData systemData = null, string provisioningState = null, IDictionary<string, string> tags = null, IDictionary<string, string> properties = null, string isEnabled = null, IDictionary<string, EvaluatorConfiguration> evaluators = null, Trigger trigger = null)
         {
             tags ??= new Dictionary<string, string>();
             properties ??= new Dictionary<string, string>();
@@ -85,9 +86,10 @@ public static EvaluationSchedule EvaluationSchedule(string name = null, Applicat
                 data,
                 description,
                 systemData,
-                provisioningStatus,
+                provisioningState,
                 tags,
                 properties,
+                isEnabled,
                 evaluators,
                 trigger,
                 serializedAdditionalRawData: null);
@@ -186,6 +188,23 @@ public static ThreadMessageOptions ThreadMessageOptions(MessageRole role = defau
             return new ThreadMessageOptions(role, content, attachments?.ToList(), metadata, serializedAdditionalRawData: null);
         }
 
+        /// <summary> Initializes a new instance of <see cref="Projects.MessageIncompleteDetails"/>. </summary>
+        /// <param name="reason"> The provided reason describing why the message was marked as incomplete. </param>
+        /// <returns> A new <see cref="Projects.MessageIncompleteDetails"/> instance for mocking. </returns>
+        public static MessageIncompleteDetails MessageIncompleteDetails(MessageIncompleteDetailsReason reason = default)
+        {
+            return new MessageIncompleteDetails(reason, serializedAdditionalRawData: null);
+        }
+
+        /// <summary> Initializes a new instance of <see cref="Projects.MessageTextAnnotation"/>. </summary>
+        /// <param name="type"> The object type. </param>
+        /// <param name="text"> The textual content associated with this text annotation item. </param>
+        /// <returns> A new <see cref="Projects.MessageTextAnnotation"/> instance for mocking. </returns>
+        public static MessageTextAnnotation MessageTextAnnotation(string type = null, string text = null)
+        {
+            return new UnknownMessageTextAnnotation(type, text, serializedAdditionalRawData: null);
+        }
+
         /// <summary> Initializes a new instance of <see cref="Projects.RequiredToolCall"/>. </summary>
         /// <param name="type"> The object type. </param>
         /// <param name="id"> The ID of the tool call. This ID must be referenced when submitting tool outputs. </param>
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/AgentsClient.cs b/sdk/ai/Azure.AI.Projects/src/Generated/AgentsClient.cs
index a59cc6ca00e5..6d8476ffe785 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/AgentsClient.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/AgentsClient.cs
@@ -1710,7 +1710,7 @@ public virtual Response UpdateMessage(string threadId, string messageId, Request
         /// <param name="cancellationToken"> The cancellation token to use. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="threadId"/> or <paramref name="assistantId"/> is null. </exception>
         /// <exception cref="ArgumentException"> <paramref name="threadId"/> is an empty string, and was expected to be non-empty. </exception>
-        public virtual async Task<Response<ThreadRun>> CreateRunAsync(string threadId, string assistantId, string overrideModelName = null, string overrideInstructions = null, string additionalInstructions = null, IEnumerable<ThreadMessage> additionalMessages = null, IEnumerable<ToolDefinition> overrideTools = null, bool? stream = null, float? temperature = null, float? topP = null, int? maxPromptTokens = null, int? maxCompletionTokens = null, TruncationObject truncationStrategy = null, BinaryData toolChoice = null, BinaryData responseFormat = null, IReadOnlyDictionary<string, string> metadata = null, CancellationToken cancellationToken = default)
+        public virtual async Task<Response<ThreadRun>> CreateRunAsync(string threadId, string assistantId, string overrideModelName = null, string overrideInstructions = null, string additionalInstructions = null, IEnumerable<ThreadMessageOptions> additionalMessages = null, IEnumerable<ToolDefinition> overrideTools = null, bool? stream = null, float? temperature = null, float? topP = null, int? maxPromptTokens = null, int? maxCompletionTokens = null, TruncationObject truncationStrategy = null, BinaryData toolChoice = null, BinaryData responseFormat = null, IReadOnlyDictionary<string, string> metadata = null, CancellationToken cancellationToken = default)
         {
             Argument.AssertNotNullOrEmpty(threadId, nameof(threadId));
             Argument.AssertNotNull(assistantId, nameof(assistantId));
@@ -1720,7 +1720,7 @@ public virtual async Task<Response<ThreadRun>> CreateRunAsync(string threadId, s
                 overrideModelName,
                 overrideInstructions,
                 additionalInstructions,
-                additionalMessages?.ToList() as IReadOnlyList<ThreadMessage> ?? new ChangeTrackingList<ThreadMessage>(),
+                additionalMessages?.ToList() as IReadOnlyList<ThreadMessageOptions> ?? new ChangeTrackingList<ThreadMessageOptions>(),
                 overrideTools?.ToList() as IReadOnlyList<ToolDefinition> ?? new ChangeTrackingList<ToolDefinition>(),
                 stream,
                 temperature,
@@ -1780,7 +1780,7 @@ public virtual async Task<Response<ThreadRun>> CreateRunAsync(string threadId, s
         /// <param name="cancellationToken"> The cancellation token to use. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="threadId"/> or <paramref name="assistantId"/> is null. </exception>
         /// <exception cref="ArgumentException"> <paramref name="threadId"/> is an empty string, and was expected to be non-empty. </exception>
-        public virtual Response<ThreadRun> CreateRun(string threadId, string assistantId, string overrideModelName = null, string overrideInstructions = null, string additionalInstructions = null, IEnumerable<ThreadMessage> additionalMessages = null, IEnumerable<ToolDefinition> overrideTools = null, bool? stream = null, float? temperature = null, float? topP = null, int? maxPromptTokens = null, int? maxCompletionTokens = null, TruncationObject truncationStrategy = null, BinaryData toolChoice = null, BinaryData responseFormat = null, IReadOnlyDictionary<string, string> metadata = null, CancellationToken cancellationToken = default)
+        public virtual Response<ThreadRun> CreateRun(string threadId, string assistantId, string overrideModelName = null, string overrideInstructions = null, string additionalInstructions = null, IEnumerable<ThreadMessageOptions> additionalMessages = null, IEnumerable<ToolDefinition> overrideTools = null, bool? stream = null, float? temperature = null, float? topP = null, int? maxPromptTokens = null, int? maxCompletionTokens = null, TruncationObject truncationStrategy = null, BinaryData toolChoice = null, BinaryData responseFormat = null, IReadOnlyDictionary<string, string> metadata = null, CancellationToken cancellationToken = default)
         {
             Argument.AssertNotNullOrEmpty(threadId, nameof(threadId));
             Argument.AssertNotNull(assistantId, nameof(assistantId));
@@ -1790,7 +1790,7 @@ public virtual Response<ThreadRun> CreateRun(string threadId, string assistantId
                 overrideModelName,
                 overrideInstructions,
                 additionalInstructions,
-                additionalMessages?.ToList() as IReadOnlyList<ThreadMessage> ?? new ChangeTrackingList<ThreadMessage>(),
+                additionalMessages?.ToList() as IReadOnlyList<ThreadMessageOptions> ?? new ChangeTrackingList<ThreadMessageOptions>(),
                 overrideTools?.ToList() as IReadOnlyList<ToolDefinition> ?? new ChangeTrackingList<ToolDefinition>(),
                 stream,
                 temperature,
@@ -1817,7 +1817,7 @@ public virtual Response<ThreadRun> CreateRun(string threadId, string assistantId
         /// </item>
         /// <item>
         /// <description>
-        /// Please try the simpler <see cref="CreateRunAsync(string,string,string,string,string,IEnumerable{ThreadMessage},IEnumerable{ToolDefinition},bool?,float?,float?,int?,int?,TruncationObject,BinaryData,BinaryData,IReadOnlyDictionary{string,string},CancellationToken)"/> convenience overload with strongly typed models first.
+        /// Please try the simpler <see cref="CreateRunAsync(string,string,string,string,string,IEnumerable{ThreadMessageOptions},IEnumerable{ToolDefinition},bool?,float?,float?,int?,int?,TruncationObject,BinaryData,BinaryData,IReadOnlyDictionary{string,string},CancellationToken)"/> convenience overload with strongly typed models first.
         /// </description>
         /// </item>
         /// </list>
@@ -1858,7 +1858,7 @@ public virtual async Task<Response> CreateRunAsync(string threadId, RequestConte
         /// </item>
         /// <item>
         /// <description>
-        /// Please try the simpler <see cref="CreateRun(string,string,string,string,string,IEnumerable{ThreadMessage},IEnumerable{ToolDefinition},bool?,float?,float?,int?,int?,TruncationObject,BinaryData,BinaryData,IReadOnlyDictionary{string,string},CancellationToken)"/> convenience overload with strongly typed models first.
+        /// Please try the simpler <see cref="CreateRun(string,string,string,string,string,IEnumerable{ThreadMessageOptions},IEnumerable{ToolDefinition},bool?,float?,float?,int?,int?,TruncationObject,BinaryData,BinaryData,IReadOnlyDictionary{string,string},CancellationToken)"/> convenience overload with strongly typed models first.
         /// </description>
         /// </item>
         /// </list>
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.Serialization.cs b/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.Serialization.cs
index 9346614ba846..91cd817d3827 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.Serialization.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.Serialization.cs
@@ -268,7 +268,7 @@ internal static CreateRunRequest DeserializeCreateRunRequest(JsonElement element
             string model = default;
             string instructions = default;
             string additionalInstructions = default;
-            IReadOnlyList<ThreadMessage> additionalMessages = default;
+            IReadOnlyList<ThreadMessageOptions> additionalMessages = default;
             IReadOnlyList<ToolDefinition> tools = default;
             bool? stream = default;
             float? temperature = default;
@@ -324,10 +324,10 @@ internal static CreateRunRequest DeserializeCreateRunRequest(JsonElement element
                     {
                         continue;
                     }
-                    List<ThreadMessage> array = new List<ThreadMessage>();
+                    List<ThreadMessageOptions> array = new List<ThreadMessageOptions>();
                     foreach (var item in property.Value.EnumerateArray())
                     {
-                        array.Add(ThreadMessage.DeserializeThreadMessage(item, options));
+                        array.Add(ThreadMessageOptions.DeserializeThreadMessageOptions(item, options));
                     }
                     additionalMessages = array;
                     continue;
@@ -450,7 +450,7 @@ internal static CreateRunRequest DeserializeCreateRunRequest(JsonElement element
                 model,
                 instructions,
                 additionalInstructions,
-                additionalMessages ?? new ChangeTrackingList<ThreadMessage>(),
+                additionalMessages ?? new ChangeTrackingList<ThreadMessageOptions>(),
                 tools ?? new ChangeTrackingList<ToolDefinition>(),
                 stream,
                 temperature,
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.cs b/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.cs
index 8d7f0f84341c..b47736e413eb 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/CreateRunRequest.cs
@@ -53,7 +53,7 @@ internal CreateRunRequest(string assistantId)
             Argument.AssertNotNull(assistantId, nameof(assistantId));
 
             AssistantId = assistantId;
-            AdditionalMessages = new ChangeTrackingList<ThreadMessage>();
+            AdditionalMessages = new ChangeTrackingList<ThreadMessageOptions>();
             OverrideTools = new ChangeTrackingList<ToolDefinition>();
             Metadata = new ChangeTrackingDictionary<string, string>();
         }
@@ -102,7 +102,7 @@ internal CreateRunRequest(string assistantId)
         /// <param name="responseFormat"> Specifies the format that the model must output. </param>
         /// <param name="metadata"> A set of up to 16 key/value pairs that can be attached to an object, used for storing additional information about that object in a structured format. Keys may be up to 64 characters in length and values may be up to 512 characters in length. </param>
         /// <param name="serializedAdditionalRawData"> Keeps track of any properties unknown to the library. </param>
-        internal CreateRunRequest(string assistantId, string overrideModelName, string overrideInstructions, string additionalInstructions, IReadOnlyList<ThreadMessage> additionalMessages, IReadOnlyList<ToolDefinition> overrideTools, bool? stream, float? temperature, float? topP, int? maxPromptTokens, int? maxCompletionTokens, TruncationObject truncationStrategy, BinaryData toolChoice, BinaryData responseFormat, IReadOnlyDictionary<string, string> metadata, IDictionary<string, BinaryData> serializedAdditionalRawData)
+        internal CreateRunRequest(string assistantId, string overrideModelName, string overrideInstructions, string additionalInstructions, IReadOnlyList<ThreadMessageOptions> additionalMessages, IReadOnlyList<ToolDefinition> overrideTools, bool? stream, float? temperature, float? topP, int? maxPromptTokens, int? maxCompletionTokens, TruncationObject truncationStrategy, BinaryData toolChoice, BinaryData responseFormat, IReadOnlyDictionary<string, string> metadata, IDictionary<string, BinaryData> serializedAdditionalRawData)
         {
             AssistantId = assistantId;
             OverrideModelName = overrideModelName;
@@ -139,7 +139,7 @@ internal CreateRunRequest()
         /// </summary>
         public string AdditionalInstructions { get; }
         /// <summary> Adds additional messages to the thread before creating the run. </summary>
-        public IReadOnlyList<ThreadMessage> AdditionalMessages { get; }
+        public IReadOnlyList<ThreadMessageOptions> AdditionalMessages { get; }
         /// <summary>
         /// The overridden list of enabled tools that the agent should use to run the thread.
         /// Please note <see cref="ToolDefinition"/> is the base class. According to the scenario, a derived class of the base class might need to be assigned here, or this property needs to be casted to one of the possible derived classes.
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.Serialization.cs b/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.Serialization.cs
index 7223d12eb966..e360c896eca0 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.Serialization.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.Serialization.cs
@@ -51,10 +51,10 @@ protected virtual void JsonModelWriteCore(Utf8JsonWriter writer, ModelReaderWrit
                 writer.WritePropertyName("systemData"u8);
                 writer.WriteObjectValue(SystemData, options);
             }
-            if (options.Format != "W" && Optional.IsDefined(ProvisioningStatus))
+            if (options.Format != "W" && Optional.IsDefined(ProvisioningState))
             {
-                writer.WritePropertyName("provisioningStatus"u8);
-                writer.WriteStringValue(ProvisioningStatus);
+                writer.WritePropertyName("provisioningState"u8);
+                writer.WriteStringValue(ProvisioningState);
             }
             if (Optional.IsCollectionDefined(Tags))
             {
@@ -78,6 +78,11 @@ protected virtual void JsonModelWriteCore(Utf8JsonWriter writer, ModelReaderWrit
                 }
                 writer.WriteEndObject();
             }
+            if (options.Format != "W" && Optional.IsDefined(IsEnabled))
+            {
+                writer.WritePropertyName("isEnabled"u8);
+                writer.WriteStringValue(IsEnabled);
+            }
             writer.WritePropertyName("evaluators"u8);
             writer.WriteStartObject();
             foreach (var item in Evaluators)
@@ -129,9 +134,10 @@ internal static EvaluationSchedule DeserializeEvaluationSchedule(JsonElement ele
             ApplicationInsightsConfiguration data = default;
             string description = default;
             SystemData systemData = default;
-            string provisioningStatus = default;
+            string provisioningState = default;
             IDictionary<string, string> tags = default;
             IDictionary<string, string> properties = default;
+            string isEnabled = default;
             IDictionary<string, EvaluatorConfiguration> evaluators = default;
             Trigger trigger = default;
             IDictionary<string, BinaryData> serializedAdditionalRawData = default;
@@ -162,9 +168,9 @@ internal static EvaluationSchedule DeserializeEvaluationSchedule(JsonElement ele
                     systemData = SystemData.DeserializeSystemData(property.Value, options);
                     continue;
                 }
-                if (property.NameEquals("provisioningStatus"u8))
+                if (property.NameEquals("provisioningState"u8))
                 {
-                    provisioningStatus = property.Value.GetString();
+                    provisioningState = property.Value.GetString();
                     continue;
                 }
                 if (property.NameEquals("tags"u8))
@@ -195,6 +201,11 @@ internal static EvaluationSchedule DeserializeEvaluationSchedule(JsonElement ele
                     properties = dictionary;
                     continue;
                 }
+                if (property.NameEquals("isEnabled"u8))
+                {
+                    isEnabled = property.Value.GetString();
+                    continue;
+                }
                 if (property.NameEquals("evaluators"u8))
                 {
                     Dictionary<string, EvaluatorConfiguration> dictionary = new Dictionary<string, EvaluatorConfiguration>();
@@ -221,9 +232,10 @@ internal static EvaluationSchedule DeserializeEvaluationSchedule(JsonElement ele
                 data,
                 description,
                 systemData,
-                provisioningStatus,
+                provisioningState,
                 tags ?? new ChangeTrackingDictionary<string, string>(),
                 properties ?? new ChangeTrackingDictionary<string, string>(),
+                isEnabled,
                 evaluators,
                 trigger,
                 serializedAdditionalRawData);
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.cs b/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.cs
index b9f90cc30e6b..ad1104435458 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/EvaluationSchedule.cs
@@ -72,9 +72,10 @@ public EvaluationSchedule(ApplicationInsightsConfiguration data, IDictionary<str
         /// <param name="data"> Data for evaluation. </param>
         /// <param name="description"> Description of the evaluation. It can be used to store additional information about the evaluation and is mutable. </param>
         /// <param name="systemData"> Metadata containing createdBy and modifiedBy information. </param>
-        /// <param name="provisioningStatus"> Status of the evaluation. It is set by service and is read-only. </param>
+        /// <param name="provisioningState"> Provisioning State of the evaluation. It is set by service and is read-only. </param>
         /// <param name="tags"> Evaluation's tags. Unlike properties, tags are fully mutable. </param>
         /// <param name="properties"> Evaluation's properties. Unlike tags, properties are add-only. Once added, a property cannot be removed. </param>
+        /// <param name="isEnabled"> Enabled status of the evaluation. It is set by service and is read-only. </param>
         /// <param name="evaluators"> Evaluators to be used for the evaluation. </param>
         /// <param name="trigger">
         /// Trigger for the evaluation.
@@ -82,15 +83,16 @@ public EvaluationSchedule(ApplicationInsightsConfiguration data, IDictionary<str
         /// The available derived classes include <see cref="CronTrigger"/> and <see cref="RecurrenceTrigger"/>.
         /// </param>
         /// <param name="serializedAdditionalRawData"> Keeps track of any properties unknown to the library. </param>
-        internal EvaluationSchedule(string name, ApplicationInsightsConfiguration data, string description, SystemData systemData, string provisioningStatus, IDictionary<string, string> tags, IDictionary<string, string> properties, IDictionary<string, EvaluatorConfiguration> evaluators, Trigger trigger, IDictionary<string, BinaryData> serializedAdditionalRawData)
+        internal EvaluationSchedule(string name, ApplicationInsightsConfiguration data, string description, SystemData systemData, string provisioningState, IDictionary<string, string> tags, IDictionary<string, string> properties, string isEnabled, IDictionary<string, EvaluatorConfiguration> evaluators, Trigger trigger, IDictionary<string, BinaryData> serializedAdditionalRawData)
         {
             Name = name;
             Data = data;
             Description = description;
             SystemData = systemData;
-            ProvisioningStatus = provisioningStatus;
+            ProvisioningState = provisioningState;
             Tags = tags;
             Properties = properties;
+            IsEnabled = isEnabled;
             Evaluators = evaluators;
             Trigger = trigger;
             _serializedAdditionalRawData = serializedAdditionalRawData;
@@ -109,12 +111,14 @@ internal EvaluationSchedule()
         public string Description { get; set; }
         /// <summary> Metadata containing createdBy and modifiedBy information. </summary>
         public SystemData SystemData { get; }
-        /// <summary> Status of the evaluation. It is set by service and is read-only. </summary>
-        public string ProvisioningStatus { get; }
+        /// <summary> Provisioning State of the evaluation. It is set by service and is read-only. </summary>
+        public string ProvisioningState { get; }
         /// <summary> Evaluation's tags. Unlike properties, tags are fully mutable. </summary>
         public IDictionary<string, string> Tags { get; }
         /// <summary> Evaluation's properties. Unlike tags, properties are add-only. Once added, a property cannot be removed. </summary>
         public IDictionary<string, string> Properties { get; }
+        /// <summary> Enabled status of the evaluation. It is set by service and is read-only. </summary>
+        public string IsEnabled { get; }
         /// <summary> Evaluators to be used for the evaluation. </summary>
         public IDictionary<string, EvaluatorConfiguration> Evaluators { get; }
         /// <summary>
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageImageFileDetails.cs b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageImageFileDetails.cs
index 923ca385b9ca..150277d11fba 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageImageFileDetails.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageImageFileDetails.cs
@@ -48,7 +48,7 @@ internal partial class InternalMessageImageFileDetails
         /// <summary> Initializes a new instance of <see cref="InternalMessageImageFileDetails"/>. </summary>
         /// <param name="internalDetails"> The ID for the file associated with this image. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="internalDetails"/> is null. </exception>
-        public InternalMessageImageFileDetails(string internalDetails)
+        internal InternalMessageImageFileDetails(string internalDetails)
         {
             Argument.AssertNotNull(internalDetails, nameof(internalDetails));
 
@@ -70,6 +70,6 @@ internal InternalMessageImageFileDetails()
         }
 
         /// <summary> The ID for the file associated with this image. </summary>
-        public string InternalDetails { get; set; }
+        public string InternalDetails { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.Serialization.cs b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.Serialization.cs
index bacb7ecd394c..925bfc4a3299 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.Serialization.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.Serialization.cs
@@ -81,7 +81,7 @@ internal static InternalMessageTextDetails DeserializeInternalMessageTextDetails
                 return null;
             }
             string value = default;
-            IList<MessageTextAnnotation> annotations = default;
+            IReadOnlyList<MessageTextAnnotation> annotations = default;
             IDictionary<string, BinaryData> serializedAdditionalRawData = default;
             Dictionary<string, BinaryData> rawDataDictionary = new Dictionary<string, BinaryData>();
             foreach (var property in element.EnumerateObject())
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.cs b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.cs
index fe9518a3e184..86770c52ed02 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextDetails.cs
@@ -54,7 +54,7 @@ internal partial class InternalMessageTextDetails
         /// The available derived classes include <see cref="MessageTextFileCitationAnnotation"/> and <see cref="MessageTextFilePathAnnotation"/>.
         /// </param>
         /// <exception cref="ArgumentNullException"> <paramref name="text"/> or <paramref name="annotations"/> is null. </exception>
-        public InternalMessageTextDetails(string text, IEnumerable<MessageTextAnnotation> annotations)
+        internal InternalMessageTextDetails(string text, IEnumerable<MessageTextAnnotation> annotations)
         {
             Argument.AssertNotNull(text, nameof(text));
             Argument.AssertNotNull(annotations, nameof(annotations));
@@ -71,7 +71,7 @@ public InternalMessageTextDetails(string text, IEnumerable<MessageTextAnnotation
         /// The available derived classes include <see cref="MessageTextFileCitationAnnotation"/> and <see cref="MessageTextFilePathAnnotation"/>.
         /// </param>
         /// <param name="serializedAdditionalRawData"> Keeps track of any properties unknown to the library. </param>
-        internal InternalMessageTextDetails(string text, IList<MessageTextAnnotation> annotations, IDictionary<string, BinaryData> serializedAdditionalRawData)
+        internal InternalMessageTextDetails(string text, IReadOnlyList<MessageTextAnnotation> annotations, IDictionary<string, BinaryData> serializedAdditionalRawData)
         {
             Text = text;
             Annotations = annotations;
@@ -84,12 +84,12 @@ internal InternalMessageTextDetails()
         }
 
         /// <summary> The text data. </summary>
-        public string Text { get; set; }
+        public string Text { get; }
         /// <summary>
         /// A list of annotations associated with this text.
         /// Please note <see cref="MessageTextAnnotation"/> is the base class. According to the scenario, a derived class of the base class might need to be assigned here, or this property needs to be casted to one of the possible derived classes.
         /// The available derived classes include <see cref="MessageTextFileCitationAnnotation"/> and <see cref="MessageTextFilePathAnnotation"/>.
         /// </summary>
-        public IList<MessageTextAnnotation> Annotations { get; }
+        public IReadOnlyList<MessageTextAnnotation> Annotations { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFileCitationDetails.cs b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFileCitationDetails.cs
index ebe496bc5941..e61364394d03 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFileCitationDetails.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFileCitationDetails.cs
@@ -49,7 +49,7 @@ internal partial class InternalMessageTextFileCitationDetails
         /// <param name="fileId"> The ID of the file associated with this citation. </param>
         /// <param name="quote"> The specific quote cited in the associated file. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="fileId"/> or <paramref name="quote"/> is null. </exception>
-        public InternalMessageTextFileCitationDetails(string fileId, string quote)
+        internal InternalMessageTextFileCitationDetails(string fileId, string quote)
         {
             Argument.AssertNotNull(fileId, nameof(fileId));
             Argument.AssertNotNull(quote, nameof(quote));
@@ -75,8 +75,8 @@ internal InternalMessageTextFileCitationDetails()
         }
 
         /// <summary> The ID of the file associated with this citation. </summary>
-        public string FileId { get; set; }
+        public string FileId { get; }
         /// <summary> The specific quote cited in the associated file. </summary>
-        public string Quote { get; set; }
+        public string Quote { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFilePathDetails.cs b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFilePathDetails.cs
index 5abadcb920db..2315f125f95e 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFilePathDetails.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/InternalMessageTextFilePathDetails.cs
@@ -48,7 +48,7 @@ internal partial class InternalMessageTextFilePathDetails
         /// <summary> Initializes a new instance of <see cref="InternalMessageTextFilePathDetails"/>. </summary>
         /// <param name="fileId"> The ID of the specific file that the citation is from. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="fileId"/> is null. </exception>
-        public InternalMessageTextFilePathDetails(string fileId)
+        internal InternalMessageTextFilePathDetails(string fileId)
         {
             Argument.AssertNotNull(fileId, nameof(fileId));
 
@@ -70,6 +70,6 @@ internal InternalMessageTextFilePathDetails()
         }
 
         /// <summary> The ID of the specific file that the citation is from. </summary>
-        public string FileId { get; set; }
+        public string FileId { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/MessageIncompleteDetails.cs b/sdk/ai/Azure.AI.Projects/src/Generated/MessageIncompleteDetails.cs
index 1c1391ccb5be..5688889deda3 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/MessageIncompleteDetails.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/MessageIncompleteDetails.cs
@@ -47,7 +47,7 @@ public partial class MessageIncompleteDetails
 
         /// <summary> Initializes a new instance of <see cref="MessageIncompleteDetails"/>. </summary>
         /// <param name="reason"> The provided reason describing why the message was marked as incomplete. </param>
-        public MessageIncompleteDetails(MessageIncompleteDetailsReason reason)
+        internal MessageIncompleteDetails(MessageIncompleteDetailsReason reason)
         {
             Reason = reason;
         }
@@ -67,6 +67,6 @@ internal MessageIncompleteDetails()
         }
 
         /// <summary> The provided reason describing why the message was marked as incomplete. </summary>
-        public MessageIncompleteDetailsReason Reason { get; set; }
+        public MessageIncompleteDetailsReason Reason { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextAnnotation.cs b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextAnnotation.cs
index 78ab0eb53b4f..63dbe8c6d7b9 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextAnnotation.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextAnnotation.cs
@@ -78,6 +78,6 @@ internal MessageTextAnnotation()
         /// <summary> The object type. </summary>
         internal string Type { get; set; }
         /// <summary> The textual content associated with this text annotation item. </summary>
-        public string Text { get; set; }
+        public string Text { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFileCitationAnnotation.cs b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFileCitationAnnotation.cs
index 27a7bbd5ecff..f1295b6fa3d9 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFileCitationAnnotation.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFileCitationAnnotation.cs
@@ -35,8 +35,8 @@ internal MessageTextFileCitationAnnotation()
         {
         }
         /// <summary> The first text index associated with this text annotation. </summary>
-        public int? StartIndex { get; set; }
+        public int? StartIndex { get; }
         /// <summary> The last text index associated with this text annotation. </summary>
-        public int? EndIndex { get; set; }
+        public int? EndIndex { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFilePathAnnotation.cs b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFilePathAnnotation.cs
index d3a16a6a28e9..ccf74d5173f4 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFilePathAnnotation.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/MessageTextFilePathAnnotation.cs
@@ -32,8 +32,8 @@ internal MessageTextFilePathAnnotation()
         {
         }
         /// <summary> The first text index associated with this text annotation. </summary>
-        public int? StartIndex { get; set; }
+        public int? StartIndex { get; }
         /// <summary> The last text index associated with this text annotation. </summary>
-        public int? EndIndex { get; set; }
+        public int? EndIndex { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.Serialization.cs b/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.Serialization.cs
index aacd25be4a4d..9dd2b99e3a9f 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.Serialization.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.Serialization.cs
@@ -173,11 +173,11 @@ internal static ThreadMessage DeserializeThreadMessage(JsonElement element, Mode
             DateTimeOffset? completedAt = default;
             DateTimeOffset? incompleteAt = default;
             MessageRole role = default;
-            IList<MessageContent> content = default;
+            IReadOnlyList<MessageContent> content = default;
             string assistantId = default;
             string runId = default;
-            IList<MessageAttachment> attachments = default;
-            IDictionary<string, string> metadata = default;
+            IReadOnlyList<MessageAttachment> attachments = default;
+            IReadOnlyDictionary<string, string> metadata = default;
             IDictionary<string, BinaryData> serializedAdditionalRawData = default;
             Dictionary<string, BinaryData> rawDataDictionary = new Dictionary<string, BinaryData>();
             foreach (var property in element.EnumerateObject())
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.cs b/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.cs
index ad6ca6e3898e..e5adfbbe605a 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/ThreadMessage.cs
@@ -65,7 +65,7 @@ public partial class ThreadMessage
         /// <param name="attachments"> A list of files attached to the message, and the tools they were added to. </param>
         /// <param name="metadata"> A set of up to 16 key/value pairs that can be attached to an object, used for storing additional information about that object in a structured format. Keys may be up to 64 characters in length and values may be up to 512 characters in length. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="id"/>, <paramref name="threadId"/> or <paramref name="contentItems"/> is null. </exception>
-        public ThreadMessage(string id, DateTimeOffset createdAt, string threadId, MessageStatus status, MessageIncompleteDetails incompleteDetails, DateTimeOffset? completedAt, DateTimeOffset? incompleteAt, MessageRole role, IEnumerable<MessageContent> contentItems, string assistantId, string runId, IEnumerable<MessageAttachment> attachments, IDictionary<string, string> metadata)
+        internal ThreadMessage(string id, DateTimeOffset createdAt, string threadId, MessageStatus status, MessageIncompleteDetails incompleteDetails, DateTimeOffset? completedAt, DateTimeOffset? incompleteAt, MessageRole role, IEnumerable<MessageContent> contentItems, string assistantId, string runId, IEnumerable<MessageAttachment> attachments, IReadOnlyDictionary<string, string> metadata)
         {
             Argument.AssertNotNull(id, nameof(id));
             Argument.AssertNotNull(threadId, nameof(threadId));
@@ -106,7 +106,7 @@ public ThreadMessage(string id, DateTimeOffset createdAt, string threadId, Messa
         /// <param name="attachments"> A list of files attached to the message, and the tools they were added to. </param>
         /// <param name="metadata"> A set of up to 16 key/value pairs that can be attached to an object, used for storing additional information about that object in a structured format. Keys may be up to 64 characters in length and values may be up to 512 characters in length. </param>
         /// <param name="serializedAdditionalRawData"> Keeps track of any properties unknown to the library. </param>
-        internal ThreadMessage(string id, string @object, DateTimeOffset createdAt, string threadId, MessageStatus status, MessageIncompleteDetails incompleteDetails, DateTimeOffset? completedAt, DateTimeOffset? incompleteAt, MessageRole role, IList<MessageContent> contentItems, string assistantId, string runId, IList<MessageAttachment> attachments, IDictionary<string, string> metadata, IDictionary<string, BinaryData> serializedAdditionalRawData)
+        internal ThreadMessage(string id, string @object, DateTimeOffset createdAt, string threadId, MessageStatus status, MessageIncompleteDetails incompleteDetails, DateTimeOffset? completedAt, DateTimeOffset? incompleteAt, MessageRole role, IReadOnlyList<MessageContent> contentItems, string assistantId, string runId, IReadOnlyList<MessageAttachment> attachments, IReadOnlyDictionary<string, string> metadata, IDictionary<string, BinaryData> serializedAdditionalRawData)
         {
             Id = id;
             Object = @object;
@@ -131,35 +131,35 @@ internal ThreadMessage()
         }
 
         /// <summary> The identifier, which can be referenced in API endpoints. </summary>
-        public string Id { get; set; }
+        public string Id { get; }
 
         /// <summary> The Unix timestamp, in seconds, representing when this object was created. </summary>
-        public DateTimeOffset CreatedAt { get; set; }
+        public DateTimeOffset CreatedAt { get; }
         /// <summary> The ID of the thread that this message belongs to. </summary>
-        public string ThreadId { get; set; }
+        public string ThreadId { get; }
         /// <summary> The status of the message. </summary>
-        public MessageStatus Status { get; set; }
+        public MessageStatus Status { get; }
         /// <summary> On an incomplete message, details about why the message is incomplete. </summary>
-        public MessageIncompleteDetails IncompleteDetails { get; set; }
+        public MessageIncompleteDetails IncompleteDetails { get; }
         /// <summary> The Unix timestamp (in seconds) for when the message was completed. </summary>
-        public DateTimeOffset? CompletedAt { get; set; }
+        public DateTimeOffset? CompletedAt { get; }
         /// <summary> The Unix timestamp (in seconds) for when the message was marked as incomplete. </summary>
-        public DateTimeOffset? IncompleteAt { get; set; }
+        public DateTimeOffset? IncompleteAt { get; }
         /// <summary> The role associated with the agent thread message. </summary>
-        public MessageRole Role { get; set; }
+        public MessageRole Role { get; }
         /// <summary>
         /// The list of content items associated with the agent thread message.
         /// Please note <see cref="MessageContent"/> is the base class. According to the scenario, a derived class of the base class might need to be assigned here, or this property needs to be casted to one of the possible derived classes.
         /// The available derived classes include <see cref="MessageImageFileContent"/> and <see cref="MessageTextContent"/>.
         /// </summary>
-        public IList<MessageContent> ContentItems { get; }
+        public IReadOnlyList<MessageContent> ContentItems { get; }
         /// <summary> If applicable, the ID of the agent that authored this message. </summary>
-        public string AssistantId { get; set; }
+        public string AssistantId { get; }
         /// <summary> If applicable, the ID of the run associated with the authoring of this message. </summary>
-        public string RunId { get; set; }
+        public string RunId { get; }
         /// <summary> A list of files attached to the message, and the tools they were added to. </summary>
-        public IList<MessageAttachment> Attachments { get; set; }
+        public IReadOnlyList<MessageAttachment> Attachments { get; }
         /// <summary> A set of up to 16 key/value pairs that can be attached to an object, used for storing additional information about that object in a structured format. Keys may be up to 64 characters in length and values may be up to 512 characters in length. </summary>
-        public IDictionary<string, string> Metadata { get; set; }
+        public IReadOnlyDictionary<string, string> Metadata { get; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/src/Generated/VectorStoreDataSource.cs b/sdk/ai/Azure.AI.Projects/src/Generated/VectorStoreDataSource.cs
index df17fb5ccff1..5752d96eef2f 100644
--- a/sdk/ai/Azure.AI.Projects/src/Generated/VectorStoreDataSource.cs
+++ b/sdk/ai/Azure.AI.Projects/src/Generated/VectorStoreDataSource.cs
@@ -50,7 +50,7 @@ public partial class VectorStoreDataSource
 
         /// <summary> Initializes a new instance of <see cref="VectorStoreDataSource"/>. </summary>
         /// <param name="assetIdentifier"> Asset URI. </param>
-        /// <param name="assetType"> The asset type *. </param>
+        /// <param name="assetType"> The asset type. </param>
         /// <exception cref="ArgumentNullException"> <paramref name="assetIdentifier"/> is null. </exception>
         public VectorStoreDataSource(string assetIdentifier, VectorStoreDataSourceAssetType assetType)
         {
@@ -62,7 +62,7 @@ public VectorStoreDataSource(string assetIdentifier, VectorStoreDataSourceAssetT
 
         /// <summary> Initializes a new instance of <see cref="VectorStoreDataSource"/>. </summary>
         /// <param name="assetIdentifier"> Asset URI. </param>
-        /// <param name="assetType"> The asset type *. </param>
+        /// <param name="assetType"> The asset type. </param>
         /// <param name="serializedAdditionalRawData"> Keeps track of any properties unknown to the library. </param>
         internal VectorStoreDataSource(string assetIdentifier, VectorStoreDataSourceAssetType assetType, IDictionary<string, BinaryData> serializedAdditionalRawData)
         {
@@ -78,7 +78,7 @@ internal VectorStoreDataSource()
 
         /// <summary> Asset URI. </summary>
         public string AssetIdentifier { get; set; }
-        /// <summary> The asset type *. </summary>
+        /// <summary> The asset type. </summary>
         public VectorStoreDataSourceAssetType AssetType { get; set; }
     }
 }
diff --git a/sdk/ai/Azure.AI.Projects/tsp-location.yaml b/sdk/ai/Azure.AI.Projects/tsp-location.yaml
index 4e3c828b8d65..e24a760be3a5 100644
--- a/sdk/ai/Azure.AI.Projects/tsp-location.yaml
+++ b/sdk/ai/Azure.AI.Projects/tsp-location.yaml
@@ -1,3 +1,4 @@
 directory: specification/ai/Azure.AI.Projects
-commit: 17ab26e678f06460cd154e2c0cb187aae158f4bf
+commit: ff99e7c7cca347239704b68873f5b585f48a9ef5
 repo: Azure/azure-rest-api-specs
+additionalDirectories: