{
  "model": "qwen2.5-coder:7b",
  "messages": [{"role": "user", "content": "What is 2+2? Use the calculator tool."}],
  "tools": [{
    "type": "function",
    "function": {
      "name": "calculator",
      "description": "Adds two numbers",
      "parameters": {
        "type": "object",
        "properties": {"a": {"type": "number"}, "b": {"type": "number"}},
        "required": ["a", "b"]
      }
    }
  }]
}