Configure router to accept SNMP request

RouterOS General
1

Hi , In an attempt to manage the device with the Microsoft SCOM , I am trying to configure the router to accept the SNMP requests from the SCOM management server .
Please let me know how to do that.
Does any one have managed the router using the SCOM, Please share the experiences.

Thanks

2 
/snmp set enabled=yes
/snmp community add name=mysecret read-access=yes write-access=yes
3

And don’t forget:

/ip firewall filter add action=accept chain=input comment="SNMP" disabled=no dst-port=161 protocol=udp src-address=xxx.xxx.xxx.xxx
4

Is it necessary to give write-access to SNMP , any way to configure the router to accept responses from a single I.P ?
Is Write-access to SNMP can be a security threat even with a private key ?

5 



/snmp community add address=your_ip