Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It usefully discloses that content triggers embedding regeneration and that unspecified fields remain unchanged. However, it does not mention error cases, permission needs, reversibility, or side effects on related memories, which would be valuable for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.