One of the promoted advantages of Snap packages is the sandboxing-feature, where a Snap program may not be able to access as much system information as a package from the repository.
Now, I have read a lot about permission problems with Snap software and how to fix them, but I don't know where to find actual information on what permissions a specific Snap package has.
The Snapcraft-website is also very brief about this.
As one concrete example: How can I find out what permissions the Discord Snap gets and (how) am I able to modify those permissions to basically only allow Pulseaudio/microphone access? (Because that's all it needs to have.)