Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds one genuine behavioral fact — that coverage is limited to 'recent' orders rather than the full historical archive — but the listed return fields are redundant given the output schema, and pagination/total-count behavior is unaddressed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.