Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already flag destructiveHint=true and openWorldHint=true, so the bar is lower, but the description adds nothing about what the destruction means: an in-place save overwrites the original file, and a file_path save overwrites or creates a file on disk. It also does not say whether a confirmation or elevated permission is required. It does correctly reflect the in-place vs. new-file distinction, so it is not contradictory.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.