Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true, destructiveHint=false, idempotentHint=true. The description adds 'no signing needed' and 'free', plus specifies the network (Arbitrum) and protocol version (GMX v2). It does not disclose return format or pagination behavior, so it adds limited context beyond what annotations already carry.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.