Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's low complexity (only one optional parameter, no annotations, no output schema), the description is mostly adequate. It tells the agent what the tool does, and the schema handles the parameter. However, it does not state what the tool returns, which might be useful, but the purpose 'discover devices' implicitly suggests a list of devices is returned. Overall, it's complete enough for the simple context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.