Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint: true, so the safety profile is covered. The description adds the use case of human-readable config files but does not disclose additional behavioral traits such as return format, handling of edge cases, or limitations. With annotations providing the safety context, the description adds only modest value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.