Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% for all three parameters (list_id, list_name, person_id) with explanations for each. The description does not add any parameter-specific guidance beyond what the schema already states. Since the schema fully documents the parameters, the baseline of 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.