Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark destructiveHint=true, indicating a destructive operation. The description adds 'permanently' to emphasize irreversibility, but does not disclose other potential side effects (e.g., associated ads or campaigns). This adds some value beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.