Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 50%: 'text' is documented as 'set: new clipboard text', while 'action' only has an enum. The description adds semantic meaning by mapping get→read and set→replace, helping the agent understand the action parameter. However, it does not clarify that text is ignored for get or required for set, so compensation is partial.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.