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. It does state that the tool returns all segment text content in plain text, which is useful, but it gives no information about ordering, concatenation behavior, how empty results are handled, whether timestamps are included, or any side effects/authorization requirements. For a tool with zero annotation support, this is a meaningful gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.