Include a discriminated LinkedResource for embedding Resources in Tool Results and Prompts

Author: evalstate

schema/draft/schema.json

@@ -634,7 +634,7 @@ export type Role = "user" | "assistant";
  */
 export interface PromptMessage {
   role: Role;
-  content: TextContent | ImageContent | AudioContent | EmbeddedResource;
+  content: ContentBlock;
 }
 
 /**
@@ -653,6 +653,19 @@ export interface EmbeddedResource {
   annotations?: Annotations;
 }
 
+/**
+ *
+ * A resource descriptor, embedded into a prompt or tool call result.
+ *
+ * It is up to the client how best to render linked resources for the benefit
+ * of the LLM and/or the user.
+ *
+ */
+export interface LinkedResource {
+  type: "linkedresource";
+  resource: Resource;
+}
+
 /**
  * An optional notification from the server to the client, informing it that the list of prompts it offers has changed. This may be issued by servers without any previous subscription from the client.
  */
@@ -682,7 +695,7 @@ export interface CallToolResult extends Result {
   /**
    * A list of content objects that represent the unstructured result of the tool call.
    */
-  content: (TextContent | ImageContent | AudioContent | EmbeddedResource | ResourceReference)[];
+  content: ContentBlock[];
 
   /**
    * An optional JSON object that represents the structured result of the tool call.
@@ -953,6 +966,14 @@ export interface Annotations {
   priority?: number;
 }
 
+/**  */
+export type ContentBlock =
+  | TextContent
+  | ImageContent
+  | AudioContent
+  | EmbeddedResource
+  | LinkedResource;
+
 /**
  * Text provided to or from an LLM.
  */
@@ -1291,7 +1312,7 @@ export interface EnumSchema {
   title?: string;
   description?: string;
   enum: string[];
-  enumNames?: string[];  // Display names for enum values
+  enumNames?: string[]; // Display names for enum values
 }
 
 /**
@@ -1335,7 +1356,11 @@ export type ClientNotification =
   | InitializedNotification
   | RootsListChangedNotification;
 
-export type ClientResult = EmptyResult | CreateMessageResult | ListRootsResult | ElicitResult;
+export type ClientResult =
+  | EmptyResult
+  | CreateMessageResult
+  | ListRootsResult
+  | ElicitResult;
 
 /* Server messages */
 export type ServerRequest =