Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds that the feed is 'bounded' and carries 'tiered signals and evidence', which is useful framing, but it never explains what 'bounded' means (result cap? recency window?) or how fresh the signals are. The 'not financial advice' line is a disclaimer rather than behavioral disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.