Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Adds real behavior beyond the annotations: repeat calls are a no-op, released:false signals the task was already submitted, a released task cannot later be submitted, and the local task folder is deleted (a side effect not conveyed by destructiveHint=false, though the shared mod itself is only returned to the pool). The one gap is that the destructiveHint=false annotation sits slightly awkwardly beside 'delete its folder' for a local workspace, and rate/permission behavior is not mentioned.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.