Models are widely used and are one of the advanced tools of software engineering. There is a necessity to export software models from one software development tool or environment and to import them into another tool or environment, especially actual this task is within the Model-Driven Software Development. Despite of the popular model description standard XML Metadata Interchange (XMI), which can be used to perform the task of the model interchange, several problems according to information loss still are appearing. The research is devoted to the comparison of the tools' abilities to exchange the software model presented in the form of Unified Modeling Language (UML) diagrams with other tools, based on a set of test cases suitable to check the completeness of the model description according to XMI standard. Authors open the discussion about the dependency between tools correspondence to the XMI standard and tool's ability of model interchange.