Pick the systems your team actually uses. Get a paste-ready claude_desktop_config.json with the right vendor and reference Model Context Protocol servers wired up. Vendor-published servers are labeled green, community labeled amber, reference implementations labeled blue.
MCP servers expose your live systems to the model. Use vendor-published servers where available; scope tokens to read-only by default; never store secrets in committed config; never expose write-capable servers to public-facing agents without security review. See your MCP client documentation for the auth model that fits your environment.