[BUG] MCP plugin enabled but no resources available - ZLS plugin not exposing tools

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?

An MCP plugin (zls from claude-code-lsps) shows as enabled in the plugin manager, but no MCP resources or tools are available to Claude.

• Plugin appears enabled in UI
• ListMcpResourcesTool returns empty array []
• Claude has no access to any ZLS tools

● listMcpResources(List all MCP resources)
  ⎿  (No resources found)
  ⎿  Interrupted · What should Claude do instead?

  ❯ /plugin
  ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
  Plugins  Discover   Installed   Marketplaces  (←/→ or tab to cycle)

  Project
  ❯ zls Plugin · claude-code-lsps · ✔ enabled

  User
  commit-commands Plugin · claude-plugins-official · ✔ enabled

What Should Happen?

1. Clear status indication — If the MCP server fails to start or register tools, the plugin status should reflect this (e.g., "Error", "Disconnected", or "No tools available") instead of showing "✔ enabled"
2. Error logging — If the SessionStart hook fails, there should be visible error output or a way to check logs
3. Tool availability — When the plugin is properly enabled, Claude should have access to ZLS tools like:

• getHover — get hover information for symbols
• getDefinition — go to definition
• getDiagnostics — get compiler errors/warnings
• getCompletions — code completions
• Or similar LSP functionality

1. Health check — Ideally, the plugin manager should verify that MCP resources are actually available after the hook runs, not just that the hook was called

Error Messages/Logs

Steps to Reproduce

1. Install the zls plugin from claude-code-lsps marketplace
2. Plugin shows as "✔ enabled" in /plugin → Installed
3. Plugin info shows:

• Status: Enabled
• Installed components: Hooks: SessionStart

1. Ask Claude to list MCP resources
2. Result: (No resources found)

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.7 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_