What is the difference between suing government officials over decisions they make and suing them over duties they do not perform?

Suing government officials over decisions they make typically involves challenging the legality or constitutionality of their actions while they are exercising their official discretion. In contrast, suing them over duties they do not perform focuses on their failure to fulfill specific responsibilities mandated by law or policy. The former often involves issues of qualified immunity, which protects officials from liability for actions taken in their official capacity, while the latter may not have the same protections if their inaction violates clear legal obligations. Thus, the context and nature of the claims significantly influence the legal standards and potential outcomes.