Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all four parameters (url, host, json, zone) have descriptions in the schema. The description adds no parameter-level meaning and does not explain why 'json' or 'zone' belong in a citation tool, but because the schema already documents each field, the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.