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 the tool returns a plan, but does not indicate side effects, authentication needs, or whether it is read-only. This is insufficient for a tool in a complex ecosystem.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.