Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive, closed-world. The description adds meaningful context beyond that: it is a third-party merchant hosted on the 0523.tw platform with fulfillment by 高雄韋泉有限公司, and the platform does not participate in sales or shipping. It also disclaims commitments on freight, delivery range, and payment.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.