Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple delete tool, the description covers the essential context: what it does, admin requirement, and how to identify the target. It lacks edge-case handling (e.g., both params provided) and return behavior, but these are minor for a delete operation. With no output schema, slightly more detail would be ideal, but the description is still quite complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.