When I run the first step uv add "mcp[cli]",

it said:
error: Requirement name `mcp` matches project name `mcp`, but self-dependencies are not permitted without the `--dev` or `--optional` flags. If your project name (`mcp`) is shadowing that of a third-party dependency, consider renaming the project.

I guess something wrong in pyproject.toml, but I don't know how to solve it.