Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, covering the safety profile. The description usefully adds that the link covers the 'whole' dataset and the exact serialization formats, but says nothing about link expiry, authentication requirements, or size limits — meaningful gaps for an openWorld download tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.