Revert "Remove CompatibilityCallToolResult"

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(

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