Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, openWorldHint, destructiveHint=false, so the safety profile is covered. The description adds only 'public', which usefully implies no authentication is required. It says nothing about rate limits, failure modes for missing ids, or whether the result is raw HTML versus parsed data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.