Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description doesn't mention parameters, but the input schema has 100% description coverage (both 'task_id' and 'project_id' are well-described in the schema). With high schema coverage, the baseline is 3, but the description's brevity and focus on the action's permanence add some semantic context, justifying a slightly higher score.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.