Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all six optional parameters (uri, page/section limits and offsets, content ratings flag) are already documented in the schema. The description adds no parameter meaning beyond that, which is the baseline 3 case when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.