warden_php_script

THE RISK

High Risk

Why warden_php_script needs a policy

This tool allows execution of arbitrary PHP scripts within a containerized Magento environment. While the blast radius is contained to a development environment (somewhat mitigating the severity from critical to high), the tool permits execution of code whose effects depend entirely on the script argument provided.

From the tool's definition Tool description states it will 'Run a PHP script inside the php-fpm container'. The verb 'Run' combined with execution of arbitrary PHP code in a production-adjacent environment (Magento development) represents code execution.

Documented attack patterns abuse exactly the kind of access warden_php_script gives an agent:

POLICY

How to control warden_php_script

PolicyLayer is an MCP gateway — it sits between your AI agents and Warden Magento MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for warden_php_script:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "warden_php_script": {
      "limits": [
        {
          "counter": "warden_php_script_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

warden_php_script stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Warden Magento MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Warden Magento MCP Server tools

Execute warden_composer Run Composer commands inside the php-fpm container Execute warden_init_project Initialize a new Warden project with Magento 2 environment Execute warden_magento_cli Run bin/magento command inside the php-fpm container Execute warden_run_unit_tests Run unit tests using PHPUnit in the php-fpm container Execute warden_start_project Start a Warden project environment Execute warden_start_svc Start Warden system services Execute warden_stop_project Stop a Warden project environment Execute warden_stop_svc Stop Warden system services

All 11 Warden Magento MCP Server tools →

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Go deeper

High-risk tools in Warden Magento MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about warden_php_script

What does the warden_php_script tool do? +

Run a PHP script inside the php-fpm container. It is categorised as a Execute tool in the Warden Magento MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on warden_php_script? +

Register the Warden Magento MCP Server MCP server in PolicyLayer and add a rule for warden_php_script: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Warden Magento MCP Server. Nothing to install.

What risk level is warden_php_script? +

warden_php_script is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit warden_php_script? +

Yes. Add a rate_limit block to the warden_php_script rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block warden_php_script completely? +

Set action: deny in the PolicyLayer policy for warden_php_script. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides warden_php_script? +

warden_php_script is provided by the Warden Magento MCP Server MCP server (run-as-root/warden-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Warden Magento MCP Server tool call.

Start from Warden Magento MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →