generate_block_variation

THE RISK

Medium Risk

Why generate_block_variation needs a policy

This tool creates or modifies block variation definitions in a WordPress/Gutenberg context. Block variations are configuration objects that define alternative versions of blocks. While the generation itself is not destructive, the output represents new data being added to the codebase.

From the tool's definition Tool generates a Gutenberg block variation. The sibling tools on this server include other generation functions (generate_gb_block, generate_gutenberg_block, generate_block_pattern) that create code artifacts.

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

POLICY

How to control generate_block_variation

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

policy.json

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

generate_block_variation 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 BOIM WordPress Stack MCP — 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 BOIM WordPress Stack MCP tools

Write format_for_wpcodebox Format any generated code for WPCodebox snippet structure Write format_wpcodebox_snippet Format a code snippet for WPCodebox plugin with proper structure and metadata Write generate_block_pattern Generate a Gutenberg block pattern Write generate_gb_block Generate GenerateBlocks-compatible block code Write generate_gb_styles Generate GenerateBlocks-specific SCSS (compile to CSS for production) Write generate_gb_template Generate GenerateBlocks template code Write generate_gutenberg_block Generate complete Gutenberg block code including block.json, PHP registration, and React c Write generate_hook Generate WordPress action or filter hook code

All 16 BOIM WordPress Stack MCP 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 generate_block_variation

What does the generate_block_variation tool do? +

Generate a Gutenberg block variation. It is categorised as a Write tool in the BOIM WordPress Stack MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_block_variation? +

Register the BOIM WordPress Stack MCP server in PolicyLayer and add a rule for generate_block_variation: 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 BOIM WordPress Stack MCP. Nothing to install.

What risk level is generate_block_variation? +

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

Can I rate-limit generate_block_variation? +

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

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

generate_block_variation is provided by the BOIM WordPress Stack MCP server (jtruax/boim-wp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every BOIM WordPress Stack MCP tool call.

Start from BOIM WordPress Stack MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →