Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure, but it only states the basic action. It does not explain scope (all loaded assets vs. entire project), potential side effects, reversibility, or permission requirements, which is especially important 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.