Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and destructiveHint, so the safety profile is covered. The description adds useful context about the metadata fields and performance characteristics, but does not disclose other behaviors like path format constraints, error conditions, or authentication requirements. This is acceptable given the simple, read-only nature.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.