Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure but fails completely. 'Set slide layout' implies a mutation operation, but the description doesn't reveal whether this requires specific permissions, whether changes are reversible, what happens to existing slide content when layout changes, or what the expected outcome looks like. For a mutation tool with zero annotation coverage, this is dangerously inadequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.