As the structure of the compound is drawn, its chiral. It can be non-correctly drawn, yes. I think OsO4 will hydroxylate double-bonds in the body and be re-oxidized so even small amounts will hurt the biology inj the body. Compounds like phosghene will be consumed and will be neutralized in the body, its not catalytical. Many toxic things in nature are enzymes, Botuline and many snake-venoms are enzymes and they catalyticaly interfere with the biochemistry. I have worked a lot with OsO4 and its volatile, you get it in the rotavapor solvent waste, you get it everywhere. Not very nice.