函数调用

curl --location -g --request POST 'http://api.example.com/v1beta/models/gemini-2.5-flash:generateContent?key=sk-xxx' \
--header 'Content-Type: application/json' \
--data-raw '{
    "system_instruction": {
        "parts": [
            {
                "text": "You are a helpful lighting system bot. You can turn lights on and off, and you can set the color. Do not perform any other tasks."
            }
        ]
    },
    "tools": [
        {
            "function_declarations": [
                {
                    "name": "enable_lights",
                    "description": "Turn on the lighting system."
                },
                {
                    "name": "set_light_color",
                    "description": "Set the light color. Lights must be enabled for this to work.",
                    "parameters": {
                        "type": "object",
                        "properties": {
                            "rgb_hex": {
                                "type": "string",
                                "description": "The light color as a 6-digit hex string, e.g. ff0000 for red."
                            }
                        },
                        "required": [
                            "rgb_hex"
                        ]
                    }
                },
                {
                    "name": "stop_lights",
                    "description": "Turn off the lighting system."
                }
            ]
        }
    ],
    "tool_config": {
        "function_calling_config": {
            "mode": "auto"
        }
    },
    "contents": [
        {
            "role": "user",
            "parts": [
                {
                    "text": "Turn on the lights please."
                }
            ]
        }
    ]
}'