Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It states what information will be shown but doesn't describe the response format, whether it requires authentication, if it has rate limits, or how current the information is. For a status-checking tool, these behavioral aspects are important but undocumented.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.