You're looking at a summary for chunks of code that are relevant to the given library. If you type what specifically you need documentation for and adjust output token count, it will give LLM relevant fragments.

It lets you emulate RAG.

I think the main problem is that the source GP is using, https://github.com/firebase/firebase-admin-java, contained almost nothing that context7 extracted as "docs".

It looks like https://firebase.google.com/docs/ is being refreshed as I type this, I imagine that using that as a source and including "Java" in the topic filter might give more results (or maybe the https://github.com/firebase/firebase-docs has the same content).