Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no output schema, the description should explain what 'current states' entails (e.g., list of timer IDs, their status, remaining time). Without that, the agent may not understand the return format. However, the tool is simple, so a score of 3 is adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.