Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides explicit use cases: 'Use when context is stale, the task is done, or you want to clear sensitive data.' It also says 'Pair with remember and recall,' pointing to complementary tools. However, it does not explicitly state when not to use it (e.g., for retrieval use recall), so it lacks a full exclusionary guideline.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.