Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already supply the safety profile (destructiveHint=true), lowering the bar, but the description adds nothing beyond that: no mention of requiring an active browser session, behavior when no forward history exists, or side effects. It is essentially a restatement of the title.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.