List all namespaces in the RAGBrain knowledge base. Returns namespace names, descriptions, document counts, and hierarchy. Use this to discover what knowledge areas are available.

Perform semantic search across the RAGBrain knowledge base. Returns relevant text chunks that match the query. Use this to find information on any topic stored in RAGBrain.

List all documents stored in a specific namespace. Returns document names, IDs, chunk counts, and creation dates. Use this to see what's in a particular knowledge area.

Retrieve the full content of a specific document by its ID. Returns the complete reconstructed text from all chunks. Use this when you need to read an entire document.

Discover documents by semantic search over their summaries. Use this to find documents about a topic BEFORE searching for specific content. Returns document titles, headings, and relevance scores. Example queries: 'documents about leadership', 'notes on valuation', 'files covering conflict resolution'. After discovering relevant documents, use ragbrain_search to find specific content.