Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, yet it only says the About section is rewritten. It does not disclose that a write only happens conditionally via a separate 'save' flag, whether publishing is live/irreversible, what happens to existing About content, or any auth/rate-limit requirements.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.