{
  "model": "gemini-2.5-pro",
  "messages": [{"role": "user", "content": "hi"}],
  "tools": [
    {
      "type": "function",
      "function": {"name": "noop", "description": "does nothing", "parameters": {"type": "object", "properties": {}}}
    }
  ],
  "tool_choice": "none"
}