Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-argument tool with simple behavior, the description is largely complete: it says what happens, in what environment, and for how long. It does not state what occurs on timeout/failure or explicitly link to the prerequisite conectar_cuenta step, but sibling context and the simple shape make this a minor gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.