Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, and the description enriches each parameter: 'room' includes URL formats, 'text' adds constraint about emptiness, 'item_id' clarifies it's the UUID from store/list, and 'password'/'owner_token' give conditional usage rules. This adds significant meaning beyond schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.