Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false and destructiveHint=false, so the safety profile is covered. The description adds meaningful context in 'Begins the ... task', signalling a kickoff/async operation that does not itself wait for completion, but it says nothing about what gets modified, side effects on existing users, or how to observe sync progress.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.