i am curious of the logistics of this. if they were there, outside of his room, to simply safeguard against the visit of unauthorized visitors during his weak moments, this seems like it could work in a way that doesn't interrupt his last moments with friends and family.
if they were literally at his bed safeguarding information, that seems quite intrusive for someone who did monumental tasks for the government. and it isn't even clear what their gameplan would be in this case. do they instruct a potentially non-coherent person to shut-up or the nurses to put him out?
hopefully it was the first of these.