Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, openWorldHint=true, so the safety profile is covered structurally. The description adds nothing beyond that — no note about what an "asset" is, whether lookup fails on unknown IDs, or what is returned, so with the low bar set by annotations it still contributes zero additional context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.