Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for behavioral disclosure. It only states the action 'set' without revealing side effects, required permissions, or what happens to the sequence (e.g., whether it modifies the active sequence, if it's destructive, or if any settings reset). The minimal wording leaves critical behavioral aspects undisclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.