Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description need not restate safety traits. The description adds useful contextual scope about searching official docs and defaulting to both doc sources. However, it does not add deeper behavioral detail such as response shape, pagination, or source behavior beyond the schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.