Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, and the schema descriptions are exceptional: siteId explains when it's required, points to cromanion_grants, and states the refusal-on-omission behavior; priorityUrls documents the 10-item limit, path/URL format with examples, and the 'handed back rather than dropped' error handling. The main description only loosely gestures at priorityUrls ('name the pages that matter most'), so the schema carries the burden — the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.