Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema fully describes the sole parameter, days, including type, range, and default value. The description repeats that days is optional and defaults to 90 without adding new semantics. Since schema description coverage is 100%, the baseline of 3 is appropriate and the description adds no meaningful parameter insight beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.