Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the basic action (jumping to a slide) and the requirement of an active slideshow, but it does not mention error handling (e.g., out-of-range index), side effects, or return behavior. This is adequate but minimal for a simple navigation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.