Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with all parameters documented in the input schema (token, scene_uuid, duration, fast). The description adds no meaning beyond this, as it doesn't explain parameter interactions (e.g., how duration and fast mode affect activation) or provide examples. With high schema coverage, the baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.