Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 67% (two of three parameters have descriptions). The description explicitly mentions 'employee_code and date range,' which maps to the start_date and end_date parameters, giving some semantic context. However, it does not add detail beyond the schema, and the employee_code parameter lacks a schema description but is named in the tool description. With coverage above 50%, the baseline of 3 is correct; the description partially compensates for the missing employee_code schema description.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.