Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is known. The description adds only the target (the application pool); it says nothing about downtime, dropped in-flight requests, required permissions, or scope of impact across the instance — the details that actually matter for a destructive restart.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.