Fixing the Javascript MCP Tool Trigger (#4788)

Author: swapnil-nagar

resources/backupTemplates/nodejs-4.x/templates/templates.json

@@ -619,7 +619,7 @@
         "id": "McpToolTrigger-JavaScript-4.x",
         "runtime": "2",
         "files": {
-            "%functionName%.js": "const { app, output, trigger } = require('@azure\/functions');\r\n\r\n\/**\r\n * Sample Dapr Service Invocation Trigger\r\n * See https:\/\/aka.ms\/azure-functions-dapr for more information about using this binding\r\n *\r\n * These tasks should be completed prior to running :\r\n *      1. Install Dapr\r\n * Run the app with below steps\r\n *      1. Start function app with Dapr: dapr run --app-id functionapp --app-port 3001 --dapr-http-port 3501 -- func host start\r\n *      2. Invoke function app: dapr publish --pubsub pubsub --publish-app-id functionapp --topic A --data '{\"value\": { \"orderId\": \"42\" } }'\r\n *\/\r\nconst daprStateOuput = output.generic({\r\n    type: \"daprState\",\r\n    stateStore: \"statestore\",\r\n    direction: \"out\",\r\n    key: \"product\"\r\n});\r\n\r\napp.generic('%functionName%', {\r\n    trigger: trigger.generic({\r\n        type: \"daprTopicTrigger\",\r\n        pubsubname: \"pubsub\",\r\n        topic: \"A\",\r\n        name: \"subEvent\"\r\n    }),\r\n    return: daprStateOuput,\r\n    handler: async (request, context) => {\r\n        context.log(\"JavaScript DaprTopic trigger with DaprState output binding function processed a request.\");\r\n        context.log(context.triggerMetadata.subEvent.data);\r\n\r\n        return context.triggerMetadata.subEvent.data;\r\n    }\r\n});"
+            "%functionName%.js": "const { app, arg } = require('@azure/functions');\n\nfunction mcpToolHello(_toolArguments, context) {\n    const mcptoolargs = context.triggerMetadata.mcptoolargs || {};\n    const name = mcptoolargs.name;\n    console.info(`Hello ${name}, I am MCP Tool!`);\n    return `Hello ${name}, I am MCP Tool!`;\n}\n\napp.mcpTool('hello', {\n    toolName: 'hello',\n    description: 'Simple hello world MCP Tool that responses with a hello message.',\n    toolProperties:{\n        name: arg.string().describe('Name to greet'),\n    },\n    handler: mcpToolHello\n});"
         },
         "metadata": {
             "defaultFunctionName": "mcpToolTrigger",