Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, and it does disclose one real behavioral trait: it restores the original byte rather than just deleting bookkeeping. However, it says nothing about session requirements, what happens if no breakpoint exists at the address, or persistence across sessions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.