GFCI or Assured Grounding — which one does the site need?
Either or both. Per 1926.404(b)(1), the contractor chooses: GFCI on every 15A/20A 125V receptacle in use, OR an Assured Grounding Conductor Program (AGCP) with documented periodic continuity tests of every cord and tool ground. Most sites use GFCI because it's lower documentation overhead.