The rules indicate that only players on a specific space can look at the cards there; others can only hear their interpretation of it. Do you think this applies to encounters too? Are the card holders supposed to grab the necessary shields themselves and simply describe the fight to their fellow players? We play this way, but it always feels odd, since everyone can see the dice rolls and shields...it feels like they're "there" anyway. I guess I'm asking...are we being too hardcore with these rules??
My team plays the same way as you J C, the shields are put out, and the test card is kept face down. Other agents then know the scale of the challenge, and have the occupying agent's description, but, until each arrives on the test's space, the facts of the test aren't known for sure.
I can't think if there has been an actual example, but it's easy to conceive of a situation where the test renders an agent incapable of describing the situation accurately, or at all (there is something like that in APOD, but that wasn't a test), so it would be inappropriate to flip the card face up for others to see.
For me, it's best to follow the rules for card facings.