I’ll always carry a small folder, usually an Opinel No6 and a SAK Alox Electrician. Often, I carry a small fixed blade if I think I will need it. It has to fit in my pocket, so not over 7” overall. Here are a couple I carry frequently, a custom by David Mary that I call an EDC cimeter, due to the upswept blade, and another by a guy in Croatia who goes by Daabo.
The next one is an Anza, made from a file. I have a couple of this pattern. The full-length handle and the short blade is good for a variety of uses, like cutting fuel hose, scraping gaskets and slicing salami.
The last one is my favorite Opinel 6, sadly gone missing. I have a suitable replacement, but I liked this one better.