In the context of cognitive agent programming frameworks,a main research effort accounts for exploiting goalorientation for specifying and enacting agent interaction. Existing research work focuses almost totally on direct communication 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 artifactbased 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 theJadex platform (enrolling the Belief Desire Intention modelof agency) with the CARTAGO technology (enabling the designof artifact based environments).