Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of disclosing behavior. It merely states the purpose without mentioning that the operation is read-only, what output to expect, or any other behavioral traits. The implication of 'help' being non-destructive is weak.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.