https://beaker-project.org/docs/user-guide/task-metadata.html#fields-in-testinfo-desc Architectures field is missing.
In addition to Architectures, it looks like the following fields are mentioned in testinfo.py but not documented in task-metadata.rst TestVersion Priority Destructive License Confidential Path Bugs Type Environment
So from what I can determine, beaker cares about the following fields: Priority Destructive License Path Bugs Type
Determining how all these parameters work and to what extent requires a bit more time than I have at the moment.