During execution of pre-planned operations so exactly zero relevance to the subject of this thread.
Speaking of which, all the discussion of OC and Batons is also irrelevant to an agent riding the metro on their way to work.
Regardless of agency very few plainclothes federal agents actually carry OC or batons on their person regularly. Most either have them on duty /tactical belts worn on ore-planned operations or keep them in a briefcase /EDC bag and throw them on for interviews or other contacts. That’s working in the field. Among HQ folks you’re lucky if they carry their gun.
As @TC215 Alluded to, the proactive nature of most federal LE work vs the reactive nature of patrol work makes body cams far less relevant.