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, but 'Rename a collection' reveals nothing about side effects (e.g., whether the rename propagates to scene references), name constraints, error behavior, or reversibility. For a mutating tool, this is a significant disclosure gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.