Would hot rocks in a metal bucket and placed in a tent cause carbon monoxide poisoning?

Not unless. Unless some carbon-containing substance burns. Hot rocks are like hot steel, hot and, hot glass. Nothing burning, so no carbon monoxide.

Related Questions

Can inhaling incense smoke cause carbon monoxide poisoning?

Yes. The burning of both traditional incense and the drug of abuse "herbal-incense"creates carbon monoxide. A significant dose of carbon monoxide in an unventilated space, especially in a susceptible individual can lead to co poisoning. Please be responsible and safe. Read more...