Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of disclosing behavioral traits. It only states 'Ungroup nodes' without explaining what happens to children after ungrouping, whether it is destructive, or if it only works on certain node types. The parameter schema mentions 'group or frame', but this context is not in the description itself.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.