Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full disclosure burden. It usefully states that 'the clone is placed at a slight offset from the original,' which is behavior beyond the input schema, but omits permissions, reversibility, whether the original is preserved, and what the tool returns.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.