Can I pull the description of a Linux Server?

You can use the script type for Autodiscover (instead of snmp) and write code to set WildValue to what you want.

If it helps, here is one that I use for webservices that perhaps you can start with and modify as needed:

import com.santaba.agent.groovyapi.snmp.Snmp
def hostname  = hostProps.get("system.hostname")

//Get list of processes from snmp
def OID_NAME  = ".1.3.6.1.2.1.25.4.2.1.4"
def OID_PARAM = ".1.3.6.1.2.1.25.4.2.1.5"
def processPaths  = Snmp.walkAsMap(hostname, OID_NAME, [:], 20000)
def processParams = Snmp.walkAsMap(hostname, OID_PARAM, [:], 20000)

//Get all unique processes
def webServices = []
processPaths.each { pid, name ->
    if (name) {
        webServices << name+"||"+processParams[pid]
    }
}
webServices = webServices.unique()

//Report all processes found, use the FILTERS of the DataSource to only get what we want
webServices.each { entry ->

    //AUTODISCOVER: WildValue_ID##WildAlias_Display##Description##WildValue2##auto.propertyhere=somevalue&auto.propertyhere2=somevalue2"
    def (process,param) = entry.tokenize('||')
    println entry+"##"+process             //+"##"+process+" "+param   (if you want to add full command in desc)
}
return 0