Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses the return type ('Detailed explanation of the changes') but does not explicitly state side-effect-free behavior, prerequisites, or whether it analyzes a project. The verb 'explain' implies a non-mutating read operation, but this is not made explicit.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.