fix tool types

Author: Pederzh

packages/mcp-use/src/server/mcp-server.ts

@@ -112,14 +112,7 @@ export class McpServer {
       inputSchema,
       async (params: any) => {
         const result = await definition.fn(params)
-        return {
-          content: [
-            {
-              type: 'text',
-              text: result,
-            },
-          ],
-        }
+        return result
       },
     )
     return this

packages/mcp-use/src/server/types.ts

@@ -1,5 +1,4 @@
-// Removed unused import
-import type {UIResource} from '@mcp-ui/server'
+import type { CallToolResult } from '@modelcontextprotocol/sdk/types.js'
 export interface ServerConfig {
   name: string
   version: string
@@ -46,5 +45,5 @@ export interface PromptDefinition {
 
 export type ResourceHandler = () => Promise<string>
 export type TemplateHandler = (params: Record<string, string>) => Promise<string>
-export type ToolHandler = (params: Record<string, any>) => Promise<string| UIResource>
+export type ToolHandler = (params: Record<string, any>) => Promise<CallToolResult>
 export type PromptHandler = (params: Record<string, any>) => Promise<string>