Reserved — required by the schema system but unused for cards.
Description shown to AI agents in tool input/output schemas. Falls back to the property's help text, then label, if blank. Write for AI consumption — what does this property semantically mean in the data model (not how to fill it in).
help
label
When disabled, this property is stripped from MCP responses entirely (it won't appear in query_collection, get_object, or describe_collection output). Use for internal-only properties (supplier costs, internal notes, etc.) that admins set but shouldn't reach AI agents. To restrict filtering/sorting instead, edit the schema's index list — the index is what query_collection / search_collection iterate over.
index