Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 0% schema description coverage (the schema only has generic 'Input for deleting a focus record'), the description provides no parameter information at all. However, there's only one parameter (record_id), so the baseline is 4, but the description doesn't compensate for the schema gap, so it scores 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.