[BUG] the /mcp command does not show all available MCP servers, while the "claude mcp list" in a terminal does

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When I use the the /mcp command within Claude Code, the result does not show all available MCP servers, while the "claude mcp list" in a terminal does. In this particular case, the missing MCP server is for Datadog.

What Should Happen?

when a user uses the /mcp command within Claude Code, it should return the complete set of MCP servers.

Error Messages/Logs

There is no error

Steps to Reproduce

1. Within Claude Code use the /mcp command
2. Within a terminal, use the claude mcp list command

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.62

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_