Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With only openWorldHint declared, the description carries the behavioral burden, and it discloses the deprecation lifecycle and removal timeline, which is genuinely useful context. However, it punts on what the operation actually does ('same behaviour') rather than stating that it deploys/publishes files, so side effects and auth expectations remain undocumented.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.