Usability
Interface 
User-friendliness/complexity of the tool´s interface
Straightforward, easy-to-navigate.
Time efficiency Time needed for mastering the „how-to“ of the tool and a production of a task
Medium.
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?
High(?). Anvill does not share or sell user data to third parties, has enterprise-level security, and is ad-free. However, it does not feature an elaborated privacy section and does not mention GDPR compliance. 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)