wpcs_fix_file

THE RISK

Medium Risk

Why wpcs_fix_file needs a policy

The tool modifies existing PHP files in-place by automatically correcting coding standard violations. This is a Write operation as it alters file content, but is generally reversible via version control. It does not execute arbitrary code or delete data, but it does overwrite file contents which could introduce unintended changes if the auto-fixer behaves unexpectedly.

From the tool's definition Auto-fix WordPress Coding Standards violations in a PHP file using phpcbf. Fixes spacing, formatting, and other auto-fixable issues.

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

POLICY

How to control wpcs_fix_file

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "wpcs_fix_file": {
      "limits": [
        {
          "counter": "wpcs_fix_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

wpcs_fix_file stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register WPCS 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More WPCS MCP Server tools

Execute wpcs_full_check Run comprehensive WordPress code check: WPCS + PHP Compatibility + Quality (security, perf Execute wpcs_pre_commit Pre-commit workflow optimized for WordPress plugins/themes: Auto-fix staged PHP files, re- Write wpcs_generate_report Generate a comprehensive report in JSON, Markdown, or summary format. Runs all enabled che Read wpcs_check_directory Check all PHP files in a directory against WordPress Coding Standards. Automatically exclu Read wpcs_check_file Check a single PHP file against WordPress Coding Standards. Read wpcs_check_php_compatibility Check PHP files for compatibility with specific PHP versions (8.1, 8.2, 8.3, 8.4). Uses PH Read wpcs_check_staged Check all staged PHP files against WordPress Coding Standards. Use this before committing Read wpcs_code_analysis Detect dead code and hook issues: unused/undefined functions, orphan callbacks, duplicate

All 14 WPCS MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about wpcs_fix_file

What does the wpcs_fix_file tool do? +

Auto-fix WordPress Coding Standards violations in a PHP file using phpcbf. Fixes spacing, formatting, and other auto-fixable issues. It is categorised as a Write tool in the WPCS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wpcs_fix_file? +

Register the WPCS MCP Server MCP server in PolicyLayer and add a rule for wpcs_fix_file: 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 WPCS MCP Server. Nothing to install.

What risk level is wpcs_fix_file? +

wpcs_fix_file is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit wpcs_fix_file? +

Yes. Add a rate_limit block to the wpcs_fix_file 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 wpcs_fix_file completely? +

Set action: deny in the PolicyLayer policy for wpcs_fix_file. 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 wpcs_fix_file? +

wpcs_fix_file is provided by the WPCS MCP Server MCP server (vapvarun/wpcs-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 WPCS MCP Server tool call.

Start from WPCS 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 →