Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this as a read-only, idempotent, non-destructive, closed-world lookup, so the safety profile is fully covered without description help. The description adds that results are matched 'exact'-ly against a published contract, which is useful context, but it says nothing about what happens on zero matches, how results are ordered, or how the limit interacts with result volume.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.