Considering the question mentions the production of Sisal vaseline, I think the question is actually, could it be that the olive oil used extracts anti-microbial compounds.

I think if you want to know if there are anti-microbial compounds in the vaseline, you could try analyzing the vaseline itself. Then to determine whether the anti-microbials come from the sisal, or are already in the olive oil, you'd have to check the olive oil used separately and also make an extract of the sisal to check the presence of anti-microbials there.

But from the excellent answer from Boaz I think the answer would be, yes it is very well possible that the production method of Sisal vaseline, using olive oil, extracts active compounds (including anti-microbials) from the Agave.