Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple query tool with no output schema and no annotations, the description covers the basic resource types returned (courses, exams, schedule). However, it omits whether today is included, how the day window is bounded, and any return format detail, leaving minor gaps for the agent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.