Tools and function calling

Basic flow

• Send a `tools` list with JSON Schema functions.
• The model returns `tool_calls` when it needs external data.
• Execute the function in your backend and return its result as a `tool` message.
• Make a second call so the model can write the final answer.

Minimal example

{
  "model": "Qwen/Qwen3.6-35B-A3B",
  "messages": [{"role": "user", "content": "Find order A-102 status"}],
  "tools": [{
    "type": "function",
    "function": {
      "name": "get_order_status",
      "parameters": {
        "type": "object",
        "properties": { "order_id": { "type": "string" } },
        "required": ["order_id"]
      }
    }
  }]
}

Best practices

• Always validate tool arguments server-side; never execute sensitive actions just because the model asked.
• Use stable function names and short descriptions focused on when to call the tool.
• For destructive operations, require explicit user confirmation before execution.