The package help to find and insert bib-entry key to document. Multiple .bib files can be used. The fuzzy-finder is used to look up entry.
The command insert only ID of entry, without any additional text like \cite{...}
or similar.
Package can be used in any language scope, so it work fine in LaTeX document, python document (e.g. for PyLaTeX package) and more.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.