Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With schema description coverage reported at 0%, the description must carry the parameter burden and largely does: it restates the look-back window default and cap, the result-count default and cap, and the ordering. It doesn't clarify invalid-value handling (e.g., days > 180), which is the only remaining gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.