“. . .tolerance does increase the amount you can drink before those symptoms begin to manifest.”
Yes. . .it’s called “masking”
No, this is something completely different. Your liver actually can get more efficient at processing alcohol, so that you can drink more without reaching the concentration of alcohol in your blood (or more importantly in your brain) that would cause symptoms to appear. Of course, with sustained heavy drinking, your liver will get less efficient, so there is a point of diminishing returns.