Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuinely non-obvious behavioral context: results are limited to factual published policies and final acceptance rests with government due diligence, telling the agent the output is advisory and potentially stale. It does not cover freshness/rate-limit behavior, which keeps it from a 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.