{
  "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. Also set them to orange."
    }
  }
}