Tool calling

{
  "model": "mesh/claude-sonnet-4.5",
  "messages": [{ "role": "user", "content": "What is the weather in New York?" }],
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "get_weather",
        "description": "Get current weather for a city",
        "parameters": {
          "type": "object",
          "properties": { "city": { "type": "string" } },
          "required": ["city"]
        }
      }
    }
  ]
}

{
  "choices": [
    {
      "finish_reason": "tool_calls",
      "index": 0,
      "message": {
        "content": null,
        "role": "assistant",
        "tool_calls": [
          {
            "id": "tooluse_abc123",
            "type": "function",
            "function": {
              "name": "get_weather",
              "arguments": "{\"city\":\"New York\"}"
            }
          }
        ]
      }
    }
  ]
}

{
  "model": "mesh/claude-sonnet-4.5",
  "messages": [
    { "role": "user", "content": "What is the weather in New York?" },
    {
      "role": "assistant",
      "content": null,
      "tool_calls": [
        {
          "id": "tooluse_abc123",
          "type": "function",
          "function": {
            "name": "get_weather",
            "arguments": "{\"city\":\"New York\"}"
          }
        }
      ]
    },
    {
      "role": "tool",
      "tool_call_id": "tooluse_abc123",
      "content": "72°F, sunny"
    }
  ],
  "tools": [
    /* same tool definitions */
  ]
}