Probably depends on exactly where you are, but in the US the "LL" in "LLC" is "Limited Liability". (The same concept applies for a C-corp, and Europe has equivalent constructs AFAIK.)
One of the main selling points of a corporation is limited liability. If you are acting on behalf of the company you are very explicitly not "jointly" or in any other way liable for its actions. There are very specific things you have to do wrong to become individually liable; this is called "piercing the veil":
https://www.nolo.com/legal-encyclopedia/personal-liability-p...