The growing practice of accumulating personal data to generate predictions about users, leverages the need for mechanisms that allow people a more effective control of their data. An emerging field of studies called Human-Data Interaction (HDI), proposes the inclusion of human at the center of the data flow, providing mechanisms for citizens to interact explicitly with the collected data. Researches in HDI have discussed ways to offer Transparency Enhancing Tools (TETs), i.e., tools that support people on HDI issues related to privacy and personal data protection. Many works conducted about TETs focuses on usability issues, exploring aspects such as efficiency, user satisfaction and ease of learning. In this work, on the other hand, we aim to assess the communicability of HDI mechanisms in TETs. Hence, we applied the Semiotic Inspection Method (SIM) to investigate if and how HDI concepts are applied in two different TETs used for personal data management. We triangulated results from the study with findings from another investigation about communicability issues carried out in the same domain, but by observing and interviewing users.