Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 1 parameter with 0% description coverage, and the tool description doesn't add any details about the 'node_id' parameter, such as its format, what 'null' means, or examples. Since there's only one parameter, the baseline is 4, but the lack of any parameter explanation in the description reduces it to 3, as it fails to compensate for the schema gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.