Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, establishing the safe read-only behavior. The description adds useful context that the trades are 'public' and 'recent,' but it does not describe return format, pagination, rate limits, or any other operational behavior beyond what the annotations already cover.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.