Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds no behavioral details beyond that, such as what happens for a missing file, authentication requirements, or whether the returned contents are raw text.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.