Usability
Interface 
User-friendliness/complexity of the tool´s interface
Intuitive, easy to use.
Time efficiency Time needed for mastering the „how-to“ of the tool and a production of a task
Extremely high.
Interface language(s) The number of languages in which the tool is currently available/adaptable to
English.
Respect for privacy Does the tool require registration? Who can see my data? Can I remain anonymous?
Medium. Suno collects various types of personal information when users provide it directly, use the services, or when it is sourced from other entities. The collection of this information serves several purposes, including marketing and promoting. Suno has implemented technical and organizational security measures to ensure the security, confidentiality, and integrity of user data. While the company is based in the United States and generally stores data on servers located in the U.S., it may transfer and store data in other locations. Suno may share user information with other users, service providers, or third parties for specific purposes, such as providing services, processing transactions, and legal and compliance purposes. It employs cookies and similar technologies for functionality, analytics, and targeting/advertising. It explains the options to disable these technologies and specifies that the website is not designed to respond to "Do Not Track" signals. Suno retains user information for as long as reasonably necessary and provides users with control over their privacy settings. The company also allows users to request access to, modification, or deletion of their personal data. For users of the EEA, it complies with the GDPR. See more here.
Saving work for future use Possiblity to save your or others´ work for reuse/reproduction
Yes.
Tailorability (If so, how?) Possibility of the tool to be used for a range of different activities (e.g. to what extent you can organize a project assignment with a central activity based on this tool)
High, users can generate virtually any kind of music through specific prompting.