@minecraft/creator-tools/data/forms/block/blockstate_string.form.json

Minecraft Creator Tools command line and libraries.

{
  "title": "Text (String) Block State",
  "description": "This is a property that can be true or false.",
  "fields": [
    {
      "id": "values",
      "title": "Choices",
      "description": "The set of allowed text values for this state.",
      "defaultValue": [
        "value1",
        "value2"
      ],
      "dataType": 17
    }
  ]
}