The document summarizes the CLARIAH Media Suite, which is part of the CLARIAH infrastructure project to build a virtual research environment for conducting humanities research with digital data and tools. The Media Suite focuses on audiovisual data and media studies. It provides access to collections of audiovisual sources and associated metadata through its Collection Inspector tool. The author discusses lessons learned about the need for data and tool transparency. The Media Suite aims to aggregate metadata about collections and provide tools for data and tool criticism to improve digital literacy.