Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple one-parameter state-change tool, the description is largely sufficient. However, it lacks context about the consequences of marking complete (e.g., whether the update set becomes locked) and how it relates to the many sibling update-set tools, leaving some ambiguity for an agent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.