Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits such as side effects or requirements, but 'Add pivot route' merely restates the tool name and offers no information about what happens when the route is added, whether it is reversible, or what permissions are needed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.