Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly lists when to use the tool: when context is stale, task is done, or to clear sensitive data. It also mentions pairing with 'remember' and 'recall', giving workflow context. However, it does not explicitly state when not to use or mention alternative deletion tools, but the conditional guidance is strong.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.