Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the offset parameter is already documented, and the description reinforces the contract by explaining the nextOffset/hasMore loop rather than repeating the field type. It adds pagination protocol (must read all pages, restart on change) that the schema alone does not convey.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.