The Baretta Model 21a Bobcat is absolutely the best pocket pistol, IMO.
I thought of the Bobcat too. A really good choice. I never fired one but they were slightly larger and were double action compared to the older .22 short and .25 models.
Many years ago I had both a Mimx and Jetfire. Those tiny little Berettas were both accurate and reliable. Actually they were amazingly accurate if you were really careful.
They could be carried cocked and locked but I think I would just keep one in the pocket with the hammer down. They were about as small as a practical gun gets.