This work gathers the experience of two different research groups that developed the agent-oriented methodologies INGENIAS and ADELFE. The particular features of the agent paradigm makes that the application of MDE approaches to it has to consider certain issues that are not common in mainstream Software Engineering. In particular, MAS methodologies usually consider several abstraction levels and perspectives, producing a richer modelling than for instance object-oriented approaches. Besides, the agent research is still object of important evolution with changing and growing conceptual frameworks. The view of these MAS research groups is promoting model transformations to bridge these gaps between perspectives in modelling, and to support the change in the modelling languages and their corresponding tools. This focus on transformations should also allow taking advantage of the semantic richness of MAS concepts in code generation, producing software that is closer to the final product since the meaning of the concept and its related behaviour are more precise.