Is it necessary for sunglasses to have tinting to block all 100% UV rays, glare, and be polarized?

I think you’d get regular glasses like that. Sunglasses need to be tinted and break the light differently in order to serve their purpose.
There is a type of regular spectacles that get tinted in bright light, but are otherwise clear. Is that what you refer to?

Well, “polarized” will reduce the light getting through so that is opposite of “no tint”. “No UV” I assume is UV blocking, so is actually standard (but they might not admit it).

I want clear lenses that stop shocking light. Possible? Like, you’re in the car and the sun is in front of you but you just want to dim the sun everything else stays pretty bright like you don’t have shades on.

There are various glasses that attempt to do as close to what you want as they can. For instance, by adjusting their tint to the current light level. But if you want the brightness to be reduced when it’s bright out, then they need to block light when it’s bright out, which is more or less what tint is – reducing the light the goes through them – that’s what the eyes are seeing when they see the glass seeming tinted.

It is also possible to have different tint or appearance from different sides of the glass, if you want it to block light coming in but not make it look like your glasses are as dark as they are looking out (an extreme obvious example being one-way mirrored lenses), but I’m not sure what the current limits to that are.

Except for not being a pair of glasses… the display on a good night vision system works that way. A camera collects the image, and a high dynamic range processor works it over to brighten dark areas and block out any saturated or overly bright areas. Your eyes stay focused on a small video screen with the processed image and are never exposed to the bright light.

@Ltryptophan – I think you just want polarized lenses to block the sun’s glare. You can get clip on (vertically) polarized lenses at Costco for <$10. It dramatically cuts glare from the road and the dashboard (horizontally polarized light), but it reduces brightness of everything else (randomly polarized light) by about half. See:
https://www.polarization.com/water/water.html
http://www.allaboutvision.com/sunglasses/polarized.htm