Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% and already names the enum, but the schema only says "Response shape. Defaults to markdown." The description gives real semantic content per value: markdown = rendered body, json = sections + citations + report-type-specific data, preview = abstract-only. It does not restate report_id constraints, but the schema handles those.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.