The current evolution of Information Technology leads to the increase of automatic data processing over multiple information systems. The data we deal with concerns sensitive information about users or groups of users. A typical problem in this context concerns the disclosure of confidential identity data. To tackle this difficulty, we consider in this paper the context of Hippocratic Multi-Agent Systems (HiMAS), a model designed for the privacy management. In this context, we propose a common content language combining meta-policies and application context data on one hand and on the other hand an interaction protocol for the exchange of sensitive data. Based on this proposal, agents providing sensitive data are able to check the compliance of the consumers to the HiMAS principles. The protocol that we propose is validated on a distributed calendar management application.