While bell inequalities are of crucial importance for understanding the quantum features of nature, they also have technological applications in fields such as quantum communication. In this internship, we aim to explore some more unusual uses of this strict type of nonlocality. In particular, we will study the constraints that a local hidden-variable model imposes on a system and how these limitations affect what we can do with it. One possible direction of the internship is to explore the limitations of local hidden-variable models in quantum state engineering. Are there certain properties that cannot be heralded without nonlocality? An alternative direction is to focus on the setting of quantum parameter estimation. Provided that the statistics of Alice and Bob is described by a local hidden-variable model, does this put limitations on the precision with which they can jointly estimate certain parameters of their system? If so, can these limits be surpassed in nonlocal states, thus leading to a metrological Bell inequality?