It looks like slapd's objectIdentifierMatch rule doesn't understand descriptions (though it is supposed to). You'll have to use the numeric OID instead, until that is fixed.
And file an ITS on this! :)
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html