{
  "messages": [
    { "role": "system",    "content": "你是一位有求必应的助手。" },
    { "role": "user",      "content": "豫章故郡,洪都新府。" },
    { "role": "assistant", "content": "星分翼轸,地接衡庐。" },
    { "role": "user",      "content": "襟三江而带五湖," }
  ]
}

{
  "content": [{ "type": "text", "text": "控蛮荆而引瓯越。" }]
}

{
  "tools": [{ "name": "check_calendar", "desc": "查多人某天的空档" }],
  "messages": [
    { "role": "system", "content": "你是一位有求必应的助手。" },
    { "role": "user",   "content": "帮我和张三、李四约个本周三的会。" }
  ]
}

{ "tool_calls": [{ "name": "check_calendar",
    "args": { "day": "周三", "people": ["张三","李四","我"] } }] }