acf_update_post_fields

Update multiple ACF field values for a post (field names are run through sanitize_key, so use lowercase names or field keys)

SERVERWordpress SOURCE@cavort-it-systems/wordpress-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-cvrt-jh-wordpress-mcp/acf-update-post-fields.md

WHAT IT DOES

What acf_update_post_fields does on Wordpress

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

RISK

Why acf_update_post_fields is rated Medium

Modifies post data reversibly via WordPress ACF, affecting content structure and metadata across multiple fields.

From the tool's definition Update multiple ACF field values for a post

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs acf_update_post_fields safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Wordpress, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For acf_update_post_fields, this is the rule to start with:

acf_update_post_fields Rate-limited

acf_update_post_fields 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": {
    "acf_update_post_fields": {
      "limits": [
        {
          "counter": "acf_update_post_fields_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Wordpress, apply this rule, and every acf_update_post_fields call is checked against it from then on.

FAQ

Questions about acf_update_post_fields

What does the acf_update_post_fields tool do? +

Update multiple ACF field values for a post (field names are run through sanitize_key, so use lowercase names or field keys). It is categorised as a Write tool in the Wordpress MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on acf_update_post_fields? +

Register the Wordpress MCP server in PolicyLayer and add a rule for acf_update_post_fields: 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 Wordpress. Nothing to install.

What risk level is acf_update_post_fields? +

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

Can I rate-limit acf_update_post_fields? +

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

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

acf_update_post_fields is provided by the Wordpress MCP server (@cavort-it-systems/wordpress-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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