I haven't been in this case yet as most companies I've contracted for were/are small companies <25 employees where everyone brings their own laptop (or at least

I haven't been in this case yet as most companies I've contracted for were/are small companies <25 employees where everyone brings their own laptop (or at least the contractors do). There was one company which required devices to be up to date on the latest security updates from the OS and every wednesday an employee was chasing everyone to get confirmation that our systems were updated. If a client would require an agent to be installed I would ask for a company laptop to do the work on.