In the context of cognitive agent programming frame- works, a main research effort accounts for exploiting goal- orientation for specifying and enacting agent interaction. Ex- isting research work focuses almost totally on direct com- munication models, typically based on speech-acts and FIPA ACL. In this paper we focus instead on mediated interactions, and in particular on interaction taking place in artifact- based environments, where artifacts are first-class mediating tools that are used by cognitive agents in goal-directed way. The investigation is concretely supported by integrating the Jadex platform (enrolling the Belief-Desire-Intention model of agency) with the CARTAGO technology (enabling the de- sign of artifact based environments).