Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so query, goal, plan, limit and uiLanguage are already fully documented, and the description adds no syntax or format detail beyond echoing keywords/goal/free-Pro. Baseline 3 is appropriate when the schema carries the parameter burden.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.