wachterjohannes/debug-mcp-tools

Debugging tools for debug-mcp server (clock, PHP configuration)

dev-main 2025-11-29 13:34 UTC

Requires

• php: ^8.1
• mcp/sdk: ^0.1

Requires (Dev)

• friendsofphp/php-cs-fixer: ^3.0

MIT

README

⚠️ PROTOTYPE - FOR TESTING AND DISCUSSION PURPOSES ONLY

Development and debugging tools for the debug-mcp MCP server.

Purpose

Provides two essential debugging tools:

• ClockTool: Get current time with customizable format and timezone
• PhpConfigTool: Inspect PHP configuration, extensions, and environment

Features

• Current time retrieval with timezone support
• PHP configuration inspection (version, extensions, paths, memory limits)
• Automatic discovery by debug-mcp server
• Attribute-based registration using PHP 8

Installation

composer require wachterjohannes/debug-mcp-tools

The tools will be automatically discovered when debug-mcp server starts.

Available Tools

clock

Get the current time in a specified format and timezone.

Parameters:

• format (optional, default: 'Y-m-d H:i:s'): PHP date format string
• timezone (optional, default: 'UTC'): Valid timezone identifier

Example:

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "clock",
    "arguments": {
      "format": "c",
      "timezone": "Europe/Berlin"
    }
  },
  "id": 1
}

Returns:

{
  "time": "2024-11-29T15:30:45+01:00"
}

php_config

Get PHP configuration information about the development environment.

Parameters:

• section (optional, default: 'general'): One of:
  • general: PHP version, memory limit, max execution time
  • extensions: List of loaded PHP extensions
  • paths: Include paths and configuration file locations
  • all: All information combined

Example:

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "php_config",
    "arguments": {
      "section": "general"
    }
  },
  "id": 1
}

Returns:

{
  "php_version": "8.2.12",
  "memory_limit": "256M",
  "max_execution_time": "30",
  "zend_version": "4.2.12"
}

Registration

Tools are registered via composer.json extra configuration:

{
  "extra": {
    "wachterjohannes/debug-mcp": {
      "classes": [
        "Wachterjohannes\\DebugMcp\\Tools\\ClockTool",
        "Wachterjohannes\\DebugMcp\\Tools\\PhpConfigTool"
      ]
    }
  }
}

The debug-mcp server scans installed packages for this configuration and automatically loads the tools.

Adding New Tools

To add a new tool to this package:

1. Create a class in src/ with the tool logic
2. Add #[McpTool] attribute from the SDK
3. Add the class name to composer.json extra config
4. Update this README with tool documentation

Example tool structure:

<?php
namespace Wachterjohannes\DebugMcp\Tools;

use Mcp\Capability\Attribute\McpTool;

class MyNewTool
{
    #[McpTool(
        name: 'my_new_tool',
        description: 'Description of what this tool does'
    )]
    public function execute(string $param): array
    {
        return ['result' => 'value'];
    }
}

Development

Code Quality

Format code before committing:

composer cs-fix

Testing Tools

Test individual tools by installing into a debug-mcp instance and using Claude Desktop or direct JSON-RPC messages.

Requirements

• PHP 8.1 or higher
• modelcontextprotocol/php-sdk
• wachterjohannes/debug-mcp (for testing)

Repository

GitHub: https://github.com/wachterjohannes/debug-mcp-tools

License

MIT