Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must compensate. It explains 'id' (the primary key), 'ids' for bulk, and '$expand' for sub-resources, but does not address 'query' or '$select' parameters. Given all 5 parameters are present, the coverage is partial, and the description adds some value over the schema but leaves gaps.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.