Add a web page to the knowledge base: scrape the URL, chunk and embed its text, and store it so future ask/search calls can use it. Use this to teach the system new source material before querying it.

Answer a QUESTION with a written, source-cited answer (the full multi-agent RAG pipeline: plan → retrieve → synthesize → self-critique). Use this when the user wants an ANSWER. For raw matching documents instead of a written answer, use search.

Retrieve the raw top-k source chunks matching a QUERY, with similarity scores and no synthesized answer. Use this when you want the underlying documents themselves. To get a written, cited answer instead, use ask.