Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already cover the safety profile (readOnlyHint=true, openWorldHint=false, destructiveHint=false). The description adds genuinely useful behavioral context beyond that: the list is 'standard' and incomplete, varies by family composition and nationality, and is always subject to specialist confirmation. This sets accurate expectations about data reliability.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.