Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, but the description adds minimal value beyond the schema. It implies an array of contacts to update ('multiple contacts'), which aligns with the 'inputs' array in the schema, but doesn't explain parameter structure, required fields, or the meaning of nested properties. The schema documents all parameters thoroughly, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.