Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has one parameter 'limit' with no description (schema coverage 0%). The description does not mention 'limit' at all, failing to compensate for the lack of schema documentation. While the parameter's name, type, default, and constraints are somewhat self-explanatory, the description should clarify that 'limit' controls the number of returned pieces, so it earns only 2.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.