Human Computer/Robot Interaction has concerned about developing agents and tools for an effective performance in a user interaction scenario. In particular, the study on the usage of social media tools by older adults has been of a core theme to investigate. In this study, the interaction with a social network site tool, Facebook photo albums, supported by an agent embedded in an assistant robot is analyzed. Therefore, we present a study that explores the relationship between the type of interaction with the social network tool, and the level of perceived usefulness, ease of use, ease of learning and satisfaction by the elderly as users. The study found that the type of interface interaction with the social media tool affect the perception of the older adults in usefulness, ease of use, ease of learning and satisfaction: the older adults perceived the Facebook photo albums tool more useful, easy to use, easy to learn and felt more satisfied during the interaction with the robotic interface supported by the agent. Based on the results of this work, we can approach toward the integration of social network sites technologies for older adults and robots, not only for interaction design considerations, but also to help the seniors to overcome technological and social isolation.