Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has zero parameters and no output schema, the description does a good job of stating the return value ('list of valid oppgavetyper') and the domain ('third-party data reporting'). However, it omits details such as whether the list is sorted, whether it includes deprecated types, or any error conditions, which could be important for an agent invoking the tool. Still, for a simple lookup, the information is largely sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.