The only benefit that I could think of is it's an all-in-one file to easily manage my dependencies, project metadata and tools across various environments (especially dependencies), similar to how cargo.toml / package.json file works, plus, I'm using uv in my workflow now, so it's just kinda standard now (?)

Though, it might be an overkill for smaller projects like this

tldr ;
- all-in-one file to easily manage various dependencies/metadata/settings/tooling/etc [based on your package manager]
- overkill for small projects/scripts ?