notebooklm-mcp-upstream-38-tools-not-37

Despite documentation suggesting ~37 tools, notebooklm-mcp-cli v0.5.17 exposes 38 MCP tools. The 38th is download_artifact which handles async artifact downloads and is sometimes miscounted as part of export_artifact. Net-new capabilities vs custom wrapper include: studio_revise, cross_notebook_query, batch, pipeline, tag, notebook_query_start/status, chat_configure, notebook_get/describe, source_describe/rename, source_list_drive/sync_drive, research_status, notebook_share_status/batch, refresh_auth, save_auth_tokens, server_info.