callin.io MCP to callin.io connection - Does not work

Hi,

I was interested in callin.io’s MCP and had a look at the following YouTube video - https://youtu.be/QEShi98TCaU?si=9WcTK4SnMfONyAiR - where the developer demonstrates how to use callin.io MCP to connect to VAPI’s AI Voice Assistant. I followed the video precisely, copying all the essential prompts, but I was unable to send even a single SMS.

This is what I see in the call log:

{
  "role": "tool_calls",
  "time": 1748618189819,
  "message": "",
  "toolCalls": [
    {
      "id": "call_DNwH6A7UxXINoWwlcIApDKjr",
      "type": "function",
      "function": {
        "name": "mcp_tool",
        "arguments": "{}"
      }
    },
    {
      "id": "call_PCMnea2spYJ7bHp1U0CglJOr",
      "type": "function",
      "function": {
        "name": "mcp_tool",
        "arguments": "{}"
      }
    }
  ],
  "secondsFromStart": 74.633
}

Where does the problem seem to be? Could you please assist?

Thanks,

Shanker Nair