Most of the bikes that I have owned have come with just a couple of small cheap wrenches.
I always put together my own tool bag with whatever I need to remove the wheels and repair a flat. If there is room I try and carry all the tools I use to do regular maintenance. In addition some generic, but useful things like pliers, tape, knife, wire and JB Weld. If I can’t fix the problem, someone else around might be able to if I have the right tools.
I also carry a first aid kit. I used to think, what’s the point, I’m not a paramedic. Then my friend’s wife had a minor crash in the mountains in North Carolina. She was OK, but her knee was skinned up pretty bad and wouldn’t stop bleeding.
We rode an hour and found a drug store to get her some bandages, antibiotic spray etc. While they tended to her knee, I put together a first aid kit and have always carried one since.
I figure, I may not be a mechanic or paramedic, but I can at least carry some essentials and someone else may have the knowhow if I don’t.