[
  [
    {
      "type": "text",
      "text": "Echo: Hello, world!"
    }
  ],
  [
    {
      "type": "text",
      "text": "The sum of 1 and 2 is 3."
    }
  ],
  [
    {
      "type": "text",
      "text": "Long running operation completed. Duration: 1 seconds, Steps: 5."
    }
  ],
  [
    {
      "type": "text",
      "text": "{\"temperature\":22.5,\"conditions\":\"Partly cloudy\",\"humidity\":65}"
    }
  ]
]