From 1962943b226b2370a7380ff7527c37ecde121996 Mon Sep 17 00:00:00 2001
From: Justin Spahr-Summers <justin@jspahrsummers.com>
Date: Wed, 4 Dec 2024 17:09:31 +0000
Subject: [PATCH 1/2] Revert "Remove `CompatibilityCallToolResult`"

---
 src/client/index.ts |  5 ++++-
 src/types.ts        | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/client/index.ts b/src/client/index.ts
index afc724208..1ad516166 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -11,6 +11,7 @@ import {
   ClientNotification,
   ClientRequest,
   ClientResult,
+  CompatibilityCallToolResultSchema,
   CompleteRequest,
   CompleteResultSchema,
   EmptyResultSchema,
@@ -376,7 +377,9 @@ export class Client<
 
   async callTool(
     params: CallToolRequest["params"],
-    resultSchema: typeof CallToolResultSchema,
+    resultSchema:
+      | typeof CallToolResultSchema
+      | typeof CompatibilityCallToolResultSchema = CallToolResultSchema,
     options?: RequestOptions,
   ) {
     return this.request(
diff --git a/src/types.ts b/src/types.ts
index 5db06a5da..44a44d8f0 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -752,6 +752,15 @@ export const CallToolResultSchema = ResultSchema.extend({
   isError: z.boolean().default(false).optional(),
 });
 
+/**
+ * CallToolResultSchema extended with backwards compatibility to protocol version 2024-10-07.
+ */
+export const CompatibilityCallToolResultSchema = CallToolResultSchema.or(
+  ResultSchema.extend({
+    toolResult: z.unknown(),
+  }),
+);
+
 /**
  * Used by the client to invoke a tool provided by the server.
  */
@@ -1186,6 +1195,9 @@ export type Tool = z.infer<typeof ToolSchema>;
 export type ListToolsRequest = z.infer<typeof ListToolsRequestSchema>;
 export type ListToolsResult = z.infer<typeof ListToolsResultSchema>;
 export type CallToolResult = z.infer<typeof CallToolResultSchema>;
+export type CompatibilityCallToolResult = z.infer<
+  typeof CompatibilityCallToolResultSchema
+>;
 export type CallToolRequest = z.infer<typeof CallToolRequestSchema>;
 export type ToolListChangedNotification = z.infer<
   typeof ToolListChangedNotificationSchema

From 620cb5cb52140d3397dcd8fb2641a5cf59c5f0ea Mon Sep 17 00:00:00 2001
From: Justin Spahr-Summers <justin@jspahrsummers.com>
Date: Wed, 4 Dec 2024 17:19:00 +0000
Subject: [PATCH 2/2] Bump to 1.0.3

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 212eaf669..63fb871d1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/sdk",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Model Context Protocol implementation for TypeScript",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",