Hello Chris
Thesnmp-server host command specifies the recipient of an SNMP notification either as a trap or a response to an inform request.
If you don’t specify the server as Rene has not in his example, you are able to connect to the router and send responses to SNMP inform requests only. Traps require further configuration on the router because they are initiated by the router itself. Informs are initiated by external SNMP queriers.
I hope this has been helpful!
Laz