Is there a way to set variations for the tool start message? Like instead of just having one phrase, it can randomly choose from different variations? I tried updating the tool through the API, and now the tool JSON looks like this:

"messages": [
      {
        "type": "request-start",
        "contents": [
          {
            "type": "text",
            "text": "wait",
            "language": "en"
          },
          {
            "type": "text",
            "text": "testing",
            "language": "en"
          },
          {
            "type": "text",
            "text": "working",
            "language": "en"
          }
        ]
      }
    ]

But when I tried calling my assistant again to use the tool it just kept saying the wait phrase.

The issue is that you're only providing the contents array without the required content field. The tool message system supports both content and contents fields, where: content - A single string message contents - An array of language-specific variations Here's the correct way to structure your tool message for variations:

{
  "type": "request-start",
  "contents": [
    {
      "type": "text",
      "text": "wait",
      "language": "en"
    },
    {
      "type": "text",
      "text": "testing",
      "language": "en"
    },
    {
      "type": "text",
      "text": "working",
      "language": "en"
    }
  ],
  "blocking": false
}