Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered externally. The description adds result-interpretation context ('worker/verification/wall times are separate; model probabilities are not delivery guarantees'), which is useful but concerns output semantics rather than tool behavior. With annotations carrying the behavioral burden, this is an adequate middle score.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.