Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is low (25%), so the description carries extra weight, and it does explain the 'bucket' enum through the PENDING/POSTED/EXCLUDED tabs. It does not explicitly describe search, date filters, cardIds, accountIds, pageSize, or pageToken semantics beyond their obvious names, meaning an agent still must rely on parameter names for a good part of the input contract.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.