Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema provides descriptions for all four parameters (url, host, json, zone) with 100% coverage. While the tool description does not explain any parameter directly, the schema itself already carries the semantic load. Per the rubric, a baseline of 3 is appropriate when schema coverage is high, even if the description adds no extra parameter meaning.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.