{
  "model": "claude-opus-5",
  "messages": [{"role": "user", "content": "Do something"}],
  "max_tokens": 100,
  "tools": [
    {"type": "function", "function": {"name": "noop", "description": "does nothing", "parameters": {"type": "object", "properties": {}}}}
  ],
  "tool_choice": "none"
}