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 tells the agent this is a rebase operation, but does not mention that rebasing rewrites history, can be destructive to local workspace state, may produce conflicts, or that the operation likely mutates the change request. This lack of warning is risky for an operation of this nature.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.