Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden. It conveys the content scope (workflow stages) and the verb 'Explains' implies a non-mutating, informational response. However, it does not explicitly state that it returns a textual guide or that it has no side effects, leaving some ambiguity about the exact output format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.