PowerShell Exec MCP Server

Instructions

Input Schema

Input Schema (JSON Schema)

Implementation Reference

• server.py:659-735 (handler)

  Main handler function implementing the generate_bigfix_action_script MCP tool. It prepares parameters and calls generate_script_from_template to render the BigFix action script from the 'bigfix_action.ps1' template.
  @mcp.tool() async def generate_bigfix_action_script( description: str, action_logic: str, output_path: Optional[str] = None, timeout: Optional[int] = 60 ) -> str: """Generate a BigFix action script to perform remediation or configuration changes. Creates a PowerShell action script that follows IBM BigFix best practices: - Proper exit codes (0=success, 1=retryable failure, 2=non-retryable failure) - BigFix client log integration for monitoring - System restore point creation before changes - Comprehensive error handling and logging - Event log integration for troubleshooting ⚠️ IMPORTANT: For complete BigFix deployments, you need BOTH relevance and action scripts. Consider using 'generate_bigfix_script_pair' instead to create both scripts together. IBM BigFix References: - Action Scripts: https://help.hcltechsw.com/bigfix/11.0/platform/Platform/Console/c_creating_action_scripts.html - Exit Codes: https://help.hcltechsw.com/bigfix/11.0/platform/Platform/Console/c_action_script_exit_codes.html - Best Practices: https://help.hcltechsw.com/bigfix/11.0/platform/Platform/Console/c_best_practices_for_creating_fixlets.html - Client Logging: https://help.hcltechsw.com/bigfix/11.0/platform/Platform/Installation/c_bes_client_logging.html Args: description: Clear description of what the script should accomplish (e.g., 'Install Chrome browser', 'Configure Windows firewall') action_logic: PowerShell code that performs the action. Use 'Complete-Action -Result "Success/RetryableFailure/NonRetryableFailure" -Message "details"' to indicate completion output_path: Optional file path where the script will be saved. If not provided, returns script content timeout: Command timeout in seconds (1-300, default 60) Returns: Generated script content or path where script was saved Example: Generate a script to install Chrome: ``` result = await generate_bigfix_action_script( description="Install Chrome browser to latest version", action_logic=''' try { $installer = "$env:TEMP\\ChromeSetup.exe" Write-BigFixLog "Downloading Chrome installer..." Invoke-WebRequest -Uri "https://dl.google.com/chrome/install/latest/chrome_installer.exe" -OutFile $installer -UseBasicParsing Write-BigFixLog "Installing Chrome silently..." Start-Process -FilePath $installer -Args "/silent /install" -Wait Remove-Item $installer -Force Complete-Action -Result "Success" -Message "Chrome installation completed successfully" } catch { Complete-Action -Result "RetryableFailure" -Message "Chrome installation failed: $($_.Exception.Message)" } ''', output_path="chrome_action.ps1" ) ``` Tips: - Always use Complete-Action function to set proper exit codes - Use "Success" for completed actions - Use "RetryableFailure" for temporary issues (network, locks, etc.) - Use "NonRetryableFailure" for permanent issues (unsupported OS, etc.) - Test action logic in safe environments first - Consider creating system restore points for major changes - Use Write-BigFixLog for detailed logging and troubleshooting - Make actions idempotent (safe to run multiple times) """ params = { "SYNOPSIS": f"BigFix Action Script - {description}", "DESCRIPTION": description, "DATE": datetime.now().strftime('%Y-%m-%d'), "ACTION_LOGIC": action_logic } if output_path: output_path = ensure_directory(output_path) return await generate_script_from_template("bigfix_action", params, output_path, timeout)
• server.py:159-195 (helper)

  Helper tool used by generate_bigfix_action_script to load and populate the template file with parameters, performing variable substitution.
  async def generate_script_from_template( template_name: str, parameters: Dict[str, Any], output_path: Optional[str] = None, timeout: Optional[int] = 60 ) -> str: """Generate a PowerShell script from a template. Args: template_name: Name of the template to use (without .ps1 extension) parameters: Dictionary of parameters to replace in the template output_path: Where to save the generated script (optional) timeout: Command timeout in seconds (1-300, default 60) Returns: Generated script content or path where script was saved """ template_path = os.path.join(TEMPLATES_DIR, f"{template_name}.ps1") if not os.path.exists(template_path): raise ValueError(f"Template {template_name} not found") with open(template_path, 'r') as f: template_content = f.read() # Replace template variables script_content = template_content parameters['DATE'] = datetime.now().strftime('%Y-%m-%d') for key, value in parameters.items(): script_content = script_content.replace(f"{{{{{key}}}}}", str(value)) if output_path: with open(output_path, 'w') as f: f.write(script_content) return f"Script generated and saved to: {output_path}" return script_content
• server.py:316-325 (helper)

  Helper function to ensure the output directory exists before saving generated scripts.
  @mcp.tool() def ensure_directory(path: str) -> str: """Ensure directory exists and return absolute path.""" abs_path = normalize_path(path) if os.path.splitext(abs_path)[1]: # If path has an extension dir_path = os.path.dirname(abs_path) else: dir_path = abs_path os.makedirs(dir_path, exist_ok=True) return abs_path