Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema has 0% description coverage, so the description fully compensates. It explains site_url format with examples, action as the operation, sitemap_url as required for specific actions, and sitemap_index as optional for listing children. This adds crucial meaning beyond the schema names.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.