Ah, yes. [Documentation] is on my short term list. As a start:
L1MuonMTM_Sim_Triggers[32] - 32 global triggers fired by simulator (1 or 0). If you are running the global list, L1MuonMTM_Sim_Triggers[0] will be 1 if mu1ptxctxx fired, etc. To know which l1muo triggers map to the 32 terms, look at:
L1MuonMTM_Sim_SpecificTriggers[32] - These give the trigger number (out of 256) that is mapped to each of the 32 global terms. A list of the 256 possible triggers is at:
http://atlas.physics.arizona.edu/~johns/l1muo/l1musim/mtm-terms-v2-3-100802.pdf
so if you are using the global list (in p13.06.01 or later), L1MuonMTM_Sim_SpecificTriggers[0] is 40 (mu1ptxctxx) and so on. Note the 'combined' triggers are not in the global simulator yet (i.e., tight scint, loose wire). This is also on my short list.