Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, but it only says 'Sync TASK.md from DB.' It does not disclose whether existing TASK.md content is overwritten, whether the file is created if missing, what happens on DB errors, or whether the operation is reversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.