The package help to find and insert bib-entry key to document from user files. Multiple .bib files can be used. The fuzzy-finder is used to look up entry.
If you find entry you want, then you can press:
Package can be used in any scope, so it work fine in any file e.g. LaTeX, Python (like PyLaTeX).
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.