[
  { "task": "serve_drink", "step": 1, "description": "go to kitchen" },
  { "task": "serve_drink", "step": 2, "description": "pick up glass" },
  { "task": "serve_drink", "step": 3, "description": "deliver to human" },
  { "task": "serve_drink", "step": 4, "description": "return to base" }
]