Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered structurally. The description contributes nothing beyond that: no note on what a missing config returns, no error behavior, no scoping by org/project. With the lower bar set by annotations, this still earns only a minimal score.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.