Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simplicity of the tool (one parameter, no output schema), the description is insufficiently complete. It omits what the output looks like (e.g., column names, types, constraints) and any side effects, leaving the agent with incomplete information for reliable invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.