Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% (both text and locale are described). The description adds no additional parameter information beyond the schema. However, the schema's note about locale for 'source_url link' hints at an output detail the description does not clarify, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.