Enable /mcp desc command to filter output by server name.

[invictus2010]

Summary

This PR enhances the /mcp desc command by adding an optional argument to filter the output by server name. This allows users to inspect the details and tools of a specific MCP server without cluttering the output with information from all other connected servers.

Details

• Optional Filtering: The listAction function in mcpCommand.ts now accepts a filterServerName parameter.
• Validation: If a specific server is requested but not found, the command now returns a clear error message instead of an empty list or full list.
• Autocomplete: Added a completion handler to the desc subcommand so users can tab-complete available MCP server names.
• Unit Tests: Added comprehensive tests to mcpCommand.test.ts covering the filtering logic and error handling scenarios.

Related Issues

Fixes #17238

How to Validate

1. Start the CLI: Run the Gemini CLI.
2. Check Default Behavior: Run /mcp desc and verify it lists all configured MCP servers and their tools (standard behavior).
3. Check Filtering: Run /mcp desc (e.g., /mcp desc memory). Verify that only the specified server and its tools are displayed.
4. Check Error Handling: Run /mcp desc non-existent-server. Verify that an error message "MCP server 'non-existent-server' not found" is displayed.
5. Check Autocomplete: Type /mcp desc (with a trailing space) and press Tab. Verify that the list of available MCP servers is suggested.

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• [X ] Added/updated tests (if needed)
• [N/A ] Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run
    • npx
    • Docker
    • Podman
    • Seatbelt
  • Windows
    • npm run
    • npx
    • Docker
  • [ x] Linux
    • [x ] npm run
    • npx
    • Docker

[gemini-code-assist]

Summary of Changes

Hello @invictus2010, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly improves the usability of the /mcp desc command by introducing server-specific filtering and an intuitive autocomplete feature. These additions streamline the process of inspecting individual MCP server details, making the command more efficient and user-friendly by reducing clutter and providing immediate feedback for invalid inputs.

Highlights

• Enhanced /mcp desc command: The /mcp desc command now supports an optional server name argument, allowing users to filter the output to display details and tools for a specific MCP server only.
• Error Handling for Non-Existent Servers: If a user provides a server name that does not exist, the command now returns a clear error message instead of an empty or full list.
• Autocomplete for Server Names: Autocomplete functionality has been added to the /mcp desc subcommand, enabling users to tab-complete available MCP server names.
• Comprehensive Unit Tests: New unit tests have been added to cover the filtering logic and error handling scenarios for the enhanced /mcp desc command.

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[gemini-code-assist]

Code Review

This pull request introduces a valuable enhancement to the /mcp desc command by allowing users to filter the output by server name. The implementation is clean, robust, and handles edge cases like non-existent server names correctly. The addition of tab-completion for server names is a great usability improvement. The new unit tests are well-written and cover the filtering logic and error handling scenarios effectively. Overall, this is a high-quality contribution that improves the CLI's utility for inspecting MCP servers.

[gemini-cli]

Hi there! Thank you for your contribution to Gemini CLI. We really appreciate the time and effort you've put into this pull request.

To keep our backlog manageable and ensure we're focusing on current priorities, we are closing pull requests that haven't seen maintainer activity for 30 days. Currently, the team is prioritizing work associated with 🔒 maintainer only or help wanted issues.

If you believe this change is still critical, please feel free to comment with updated details. Otherwise, we encourage contributors to focus on open issues labeled as help wanted. Thank you for your understanding!