Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds context about returning the latest stored value for every indicator, implying a snapshot semantics, but doesn't disclose additional behavioral traits such as data freshness, response size, or any rate limits. With annotations in place, this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.