Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. The verb 'summarize' implies read-only behavior, but it does not explicitly state that the tool is non-destructive, nor does it disclose any authorization needs or rate limits. The disclosure is minimal but consistent with the tool's apparent purpose.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.