{
  "type": "object",
  "properties": {
    "props": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {"type": "string"},
          "description": {"type": "string"},
          "visual_traits": {"type": "array", "items": {"type": "string"}},
          "scene_appearances": {"type": "array", "items": {"type": "integer"}}
        },
        "required": ["name", "description", "visual_traits", "scene_appearances"],
        "additionalProperties": false
      }
    }
  },
  "required": ["props"],
  "additionalProperties": false
}