Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all four parameters (text, agent, doc_id, card_id) are already documented with formats and defaults. The description only implies the meaning of 'text' via the example reply; it adds no syntax or constraint detail beyond the schema, so baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.