wp_post_meta_update · Wp Cli MCP: Risk & Policy

WHAT IT DOES

What wp_post_meta_update does on Wp Cli

AI agents use wp_post_meta_update to create or update resources in Wp Cli — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Wp Cli environment.

WHY IT NEEDS A POLICY

Why wp_post_meta_update needs a policy

This tool modifies post metadata (custom fields, featured images, WooCommerce data) but does not delete data. The changes are reversible through subsequent updates or deletions by other means.

From the tool's definition Tool description explicitly states "Set or update a meta value for a post" - this is a create/modify operation on post metadata that is reversible.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wp_post_meta_update Rate-limited

wp_post_meta_update 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Wp Cli, so you can run agents against it safely.

FAQ

Questions about wp_post_meta_update

What does the wp_post_meta_update tool do? +

Set or update a meta value for a post. Used for custom fields, featured images, WooCommerce data, etc. It is categorised as a Write tool in the Wp Cli MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wp_post_meta_update? +

Register the Wp Cli MCP server in PolicyLayer and add a rule for wp_post_meta_update: 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 Wp Cli. Nothing to install.

What risk level is wp_post_meta_update? +

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

Can I rate-limit wp_post_meta_update? +

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

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

wp_post_meta_update is provided by the Wp Cli MCP server (mvtandas/wp-cli-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.