Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with no annotations, no output schema, and no parameters, the description is incomplete. It covers content scope but lacks crucial operational context: what format the news is returned in (articles, headlines, summaries), how many items, freshness, whether it's trending vs recent, or any error conditions. The agent would need to guess about the tool's behavior and output.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.