I have experience with philodendron cordatum 'brasil' and philodendron cordatum 'neon' with my female veiled chameleon. They're very similar in composition to pothos, but have less robust vines and thus may not hold up as well. Kismet ended up stripping her Brasil, and I eventually pulled the both of them and added a passionfruit vine (passiflora caerulea).
I subscribe to the "if there's no actual toxins in the plants, I'm going to use it" school of thought. The only thing in heart leaf philodendrons that can cause issues (in mammals; limited/no data on reptiles) are oxalate crystals, which are present in most plants to some degree. If your animal is absolutely stripping the plant I'd be more concerned than a bite here and there, but this isn't a plant that I'd hesitate to use again. However, I do prefer my passionfruit! That thing is a monster, and requires a lot of pruning.