How to enable MCP tools through MCP server

This ActivePieces video by Jordan shows how to access pieces through the MCP server. Any pointers or docs on how to do it in the current interface?

Step 1. On cloud.activepieces.com, I go to my project, click the gear button, top right, and Enable MCP Server access.
Step 2. On the same project, I go to Connections, add Gmail connector, and make sure it is connected.
Step 3. Configuring my client, like Claude Desktop as a Connector, it shows connecting but with 0 tools. How do I get Gmail tools to show there?

TIA,
Henning