Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered by structured data. The description adds genuinely new behavioral context — that the scraper list is cached and normally refreshed daily — but says nothing about what the call returns or whether it blocks until reload completes.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.