  In the context of the Minimal Geometric Deformation method, in this paper we
implement the inverse problem in a black hole scenario. In order to deal with
an anisotropic polytropic black hole solution of the Einstein field equations
with cosmological constant, the deformation method is slightly extended. After
obtaining the isotropic sector and the decoupler for an anisotropic (A-)dS
polytropic black hole solution, we emphasize a possible relation between
anisotropization/isotropization and the violation of the energy conditions.
