Jaderlail , it is great,,, I had never used this tool for posing,,
becaues there are so many option, and I can not understand clearly how to use it.
now I try it, click “space” yes it can pin bone perfectly . and I can move another bone.
I actually thought same thing Torkuda said.
when I pin transration and rotation, by pose tool, (three color circle)
the node never keep position. yes they move, if I move another bone.
but as you say,, bone tool is great for me. it works perfectly.
So I think “bone tool” means “Active pose” tools ^^;?