{
  "description": "Get/set screen brightness.",
  "prompt": "## gui_brightness\n\nGet/set screen brightness.\n\n- Actions: `get`, `set`, `up`, `down`\n\n```\ngui_brightness(action=\"get\")\ngui_brightness(action=\"set\", value=\"50\")\n```",
  "args": {
    "type": "object",
    "required": [
      "action"
    ],
    "properties": {
      "action": {
        "type": "string",
        "description": "get|set|up|down"
      },
      "value": {
        "type": "string",
        "description": "Brightness percentage (for set action)"
      }
    }
  }
}