Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description claims the tool is 'Read-only, no compute, no rate limit,' but the annotations declare readOnlyHint=false, directly contradicting that claim on the same axis. Although the description otherwise adds rich behavior (no rate limit, availability while the trigger is closed, the required disclaimer_md disclosure), the explicit contradiction with the annotation forces a 1.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.