@mpopov Is this still important given that we check for sample ratio mismatch in automated analytics? Or is it adding a check further upstream?

It's adding a check upstream, but specifically for the MW central ID enrollment.

Hm… Thinking about @phuedx's T408133: [Spike] Explore Generalizing Enrollment Authorities it would be nice to have a generalized mechanism for verifying that an enrollment authority has the desired bucketing behavior.

Two things that an enrollment authority should be good at are:

• randomly generating and managing an identifier
• converting that identifier into an enrollment/assignment determination that respects the desired split (whether it's 50/50, 90/10, or 25/25/25/25)

I think it would be good if we required that any additional enrollment authorities had to prove themselves that they are up to the task.

If we did this, I can imagine us being able to generalize that so that more enrollment authorities could be tested.