Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the action ('duplicates') but doesn't clarify key traits: whether this is a destructive operation (e.g., modifies original layer), requires specific permissions, has side effects (e.g., updates layer list), or what the output looks like. For a mutation tool with zero annotation coverage, this is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.