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

{
  "$id": "blockception.minecraft.behavior.blocks.minecraft.breathability",
  "additionalProperties": false,
  "type": "string",
  "title": "Breathability",
  "description": "Property describing the breathability of the block, and whether it's treated as a solid block or a block of air",
  "enum": ["solid", "air"],
  "default": "solid"
}