Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema descriptions cover 100% of the parameters, each with a clear meaning (e.g., 'JSON text to validate; discarded after the check'). The description adds no parameter-specific meaning beyond the schema, only a general privacy statement. Given the high schema coverage, a baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.