What MCP is, in one sentence
MCP (Model Context Protocol) is the open standard that lets any AI plug into any tool with one shared shape. Read the longer take in the Concepts Primer. This page is the install checklist.
THE 4-STEP INSTALL
Install your first MCP
cd into your CoS folder
The same folder you set up in Session 3. Open the terminal. Type cd ~/my-cos (or wherever yours lives). Claude Code knows the folder when you launch it.
Add the connector
Pick one to start. Granola for meetings, Slack for chat, Drive for docs, Gmail for inbox. Run claude mcp add granola (or whichever). Claude Code fetches the server and registers it.
OAuth in the browser
A browser tab opens. The tool asks "do you want to give Claude read access?" Click allow. The token saves locally to your .claude/ folder. Never gets pushed to git. Never leaves your machine.
Ask Claude a real question
Run claude to start a session. Ask something only the new connector could answer. For Granola: "What did the CHRO say about comp bands in Tuesday's 1:1?" Claude reads the meeting, finds the answer, cites the source.
WHAT IT LOOKS LIKE
The full install, top to bottom
CLEAR CHECK
Run every new connector through these 5
The OAuth flow is the consent. You granted it. You can revoke it.
Scope the token to read-only when you can. Never give write access on day one.
Every answer must cite the source. Meeting name, timestamp, sender, file name.
.claude/mcp.json tracks every server you have installed. Reviewable in 1 line.
One command to remove: claude mcp remove granola. Token gone, server unregistered.