There is no MediaSense or Finesse API to get which agent is logged into a particular extension.

With UCCE, You can only put your own agent’s extension on hold, you cannot put another agent on hold.Per the Dialog – Take Action on a Participant description in the developer guideAgents can only act on a participant of a dialog when they are that p...

There is no Finesse API to reposition a gadget. You can change the height of the gadget using the gadgets.window.adjustheight which is described in Chapter 9 of the Finesse WebServices developer guide here https://developer.cisco.com/docs/finesse/#!r...

Yes this is possible this is what Finesse does it will receive statistics for precision queues.