Totally depends on the tools. A nailer or impact wrench is fine with small volumes. You won't want to attach a paint gun to anything that small though. All tools should have pressure and cfm ratings that you can compare to the compressor. My little 5gal compressor handles most things around the house just fine.

Also take into account the compressor duty cycle. You probably do not want over 50% for smaller comps.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth