Honestly, easier with MCP straight up:
https://gmail.mintmcp.com/
https://gcal.mintmcp.com/
https://gdocs.mintmcp.com/
https://gsheets.mintmcp.com/
(all pass through)
(all pass through)
https://news.ycombinator.com/item?id=47157398
IMHO, CLI tools are better more often than not against MCP.
EDIT: and here is similar opinion from author himself: https://news.ycombinator.com/item?id=47252459