Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for behavioral disclosure. It says 'Read' implying non-destructiveness, but does not explain that output is accumulated, that reading may or may not clear it (despite the 'clear' parameter), or whether the tool blocks or returns immediately. Missing important behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.