guides/user/RPC-server.md

 # RPC Server (Dispatcher)
 
-Dispatchers are remote agents which provide you with scanner Instances, those Instances
+Dispatchers are remote agents which provide you with scanner _Instances_ -- _Instances_
 are the entities that actually perform the scans.
 
+Its main job is to maintain a pool of _Instances_ and, whenever a clients issues a `dispatch`
+RPC call, to pop one from the pool and pass its connection details (URL and authentication token)
+to the client.
+
+Just as importantly, it's responsible for never letting the pool deplete by replenishing it after every `dispatch` call.
+
 Setting up Dispatchers across multiple machines allows you to spread out the workload
 of many scans across multiple nodes.
 
+_For connection instructions see the [RPC-API] documentation._
+
 ## Version 0.4.2
 
 * [Simple setup](#simple)