Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with a nested-object parameter, no schema property descriptions, no annotations, no output schema, and an enormous sibling set, this is grossly insufficient. An agent cannot determine the plan format, valid confirmation tokens, the purpose of the confirm flag, or how this tool relates to rew_generate_trace_plan/rew_trace, making correct invocation effectively impossible from the provided text.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.