minecraft-bedrock-json-schemas/source/behavior/items/format/components/icon.json

{
  "$id": "blockception.minecraft.behavior.items.minecraft:icon",
  "title": "Icon",
  "description": "The icon item componenent determines the icon to represent the item in the UI and elsewhere.",
  "type": "object",
  "additionalProperties": false,
  "required": ["texture"],
  "properties": {
    "frame": {
      "type": "string",
      "title": "Frame",
      "description": "An index or expression for which frame of the icon to display. Default resolves to 0.",
      "default": 0
    },
    "legacy_id": { "type": "string", "title": "Texture", "description": "Legacy texture id for older item icons." },
    "texture": {
      "type": "string",
      "title": "Texture",
      "description": "The key from the resource_pack/textures/item_texture.json `texture_data` object associated with the texture file Example: blaze_powder."
    }
  }
}