minecraft-bedrock-json-schemas/source/behavior/blocks/format/components/unit_cube.json

{
  "$id": "blockception.minecraft.behavior.blocks.1.17.0.minecraft.unit_cube",
  "title": "Unit Cube 1.17.0",
  "description": "Specifies that a unit cube is to be used with tessellation.",
  "type": "object"
}