Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only states that it gets a summary, omitting details such as the output format, whether it is read-only, or any required permissions. 'Get' implies retrieval but does not explain what the summary contains.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.