Creates a knowledge base (current behavior).
API Key for MCP server and external service authentication
API Secret for MCP server and external service authentication
Knowledge base name
JSON array of text sources, e.g. [{"text": "...", "title": "..."}]
JSON array of URL strings
File uploads (.txt, .pdf, .doc, .docx, .md, .csv, .json; max 50MB)
Enable auto-refresh (optional, default: true)