Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Even though destructiveHint is already true, the description adds critical behavioral detail: the delete is soft, the task goes to the recycle bin for 30 days, restoration is possible, and admin-only authorization applies. It also clarifies that no confirmation phrase is required, which directly informs the agent's interaction behavior. This goes well beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.