README.md doesn't clearly say what the action does

[eli-b]

Does this action only install poetry (with support for requesting a specific version), more or less equivalently to a pip install poetry? Most of the usage examples indicate this.

Does it also create a poetry environment from my pyproject.toml? The caching usage example suggests that.

The beginning of the first sentence of README.md, "This action sets up a Poetry", is unclear.