{
  "model": "upstream-model",
  "system": [
    {
      "type": "text",
      "text": "You are a helpful assistant."
    }
  ],
  "messages": [
    {
      "role": "user",
      "content": []
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "..."
        },
        {
          "type": "tool_use",
          "id": "call_1",
          "name": "get_weather",
          "input": {
            "city": "Paris"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "content": "{\"result\":\"15 degrees\"}",
          "tool_use_id": "call_0"
        }
      ]
    }
  ],
  "max_tokens": 1024,
  "temperature": 0.7,
  "tools": [
    {
      "name": "get_weather",
      "description": "Get weather by city",
      "input_schema": {
        "properties": {
          "city": {
            "type": "string"
          }
        },
        "required": [
          "city"
        ],
        "type": "object"
      }
    }
  ]
}