minecraft-bedrock-json-schemas/source/general/item/descriptor.json

{
  "$id": "blockception.minecraft.item.descriptor",
  "oneOf": [
    {
      "$ref": "./identifier.json"
    },
    {
      "$ref": "#/definitions/object_item_descriptor"
    },
    {
      "type": "object",
      "properties": {
        "item": {
          "oneOf": [
            {
              "$ref": "./identifier.json"
            },
            {
              "$ref": "#/definitions/object_item_descriptor"
            }
          ]
        }
      }
    }
  ],
  "definitions": {
    "object_item_descriptor": {
      "type": "object",
      "properties": {
        "tags": {
          "type": "string",
          "description": "[UNDOCUMENTED] A Molang expression ran against item or block to match.",
          "examples": ["query.any_tag('minecraft:is_tool')"]
        },
        "item_tag": {
          "type": "string",
          "description": "[UNDOCUMENTED] A tag to lookup item or block by.",
          "examples": ["minecraft:is_tool"]
        }
      }
    }
  }
}