[BUG] Grafana MCP enabled (Claude Desktop) but not visible to claude code

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?

Issue: Grafana MCP connector shows as "Enabled" in Claude Desktop's Connectors menu, but exposes zero usable tools to the session.

Troubleshooting already done (all unsuccessful):

• Rechecked across multiple fresh sessions
• Restarted Claude Desktop entirely
• Uninstalled, reinstalled, and reconfigured the connector from scratch
• Repeated tool/registry checks after each step — identical empty result every time

<img width="616" height="273" alt="Image" src="https://github.com/user-attachments/assets/4ca7f98c-312a-40d4-a75d-b563f9720a20" />

<img width="1077" height="650" alt="Image" src="https://github.com/user-attachments/assets/2a420932-0961-4864-bd85-2830938ddaac" />

What Should Happen?

Expected behavior: An enabled connector should expose its tools to the session (either directly or via ToolSearch) and appear in the connector registry.

Actual behavior: UI state and session-visible tool/connector state are out of sync — connector reads "on," but is functionally invisible and unusable from the session, with no error surfaced anywhere in the chat/tool layer.

Suspected area: Claude Desktop's connector-registration/tool-exposure pipeline, not the Grafana MCP server implementation itself (likely github.com/grafana/mcp-grafana upstream, unconfirmed) — the failure mode (registered but zero tools) points at the wrapping/registration layer.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

1. Enable the Grafana MCP Server connector via Connectors menu (confirmed toggled on, screenshot available).
2. In a Claude Code CLI session, search for any Grafana-related tool (ToolSearch with keywords like "grafana", "dashboard", "datasource", "prometheus", "loki", tool-name guesses like mcp__grafana__*) — no matches found.
3. Query the MCP connector registry (list_connectors with keyword "grafana") — returns empty, "No installed connectors found," despite the UI showing it as connected.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.24012.9 (03c61d) 2026-07-24T04:59:17.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Claude for Mac
Version 1.24012.9 (03c61d)