Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a two-parameter tool with no output schema, the description covers the core action but misses important contextual nuance: it does not mention permanence, the confirm requirement (only in schema), or the boundary that only test cases are deleted, not the project. The description is minimal but adequate, though more behavioral context would improve completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.