Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds useful behavioral context: the content is public, scoped to entities/topics/sections, and lives outside the knowledge graph, which prevents an agent from treating it as KG content.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.