Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly defines the precondition ('only after clear affirmative consent'), enumerates ineligible categories (decisions, policies, preferences, plans, tasks, etc.), and clarifies that an assistant suggestion alone is not consent. It also names what the tool cannot do (approve, publish, modify public cards), effectively routing those intents elsewhere.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.