Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description must disclose side effects and safety behavior. It only states that an update and comparison occur; it does not say whether the update is destructive, whether the original is modified, what permissions are needed, or what happens if the comparison fails.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.