If you look inside the /etc/mib/netapp.mib file, all of the descriptions are included. Then you can cross reference the OIDs listed in the /etc/mib/traps.dat file. These files are found on each controller and as mentioned above are OnTap specific. 
::EXAMPLE::
v3ccFsinfos                     OBJECT-TYPE
SYNTAX                          Counter32
        MAX-ACCESS                      read-only
        STATUS                          current
DESCRIPTION
   "The number of NFS Version 3 calls received
    for the NFSPROC3_FSINFO (Get Static File
    System Information) procedure, that did not
    result in the filesystem blocking to read
    from disk, since the last time the statistics
    were cleared."
Link to the KB doc talking about cross referencing the two. https://kb.netapp.com/support/index?page=content&id=1010045