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 that resubmission is supported and that the property URL must be exact, which is genuinely useful. It does not disclose auth requirements, error behavior, or what the response confirms.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.