Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a no-parameter, no-output-schema tool, the description is nearly complete: it states what the tool lists and the scope ('current course'). However, it does not explicitly describe the return value structure (e.g., track names, IDs), which could be helpful given the absence of an output schema. This is a minor gap, keeping it from a perfect score.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.