Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Description adds context beyond annotations by clarifying it does not sign/submit/execute and that users sign locally. It also notes a preference for result fields over contract owner facts for identification. No contradiction with annotations, which already declare readOnlyHint, openWorldHint, etc.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.