ghl_update_custom_field · GoHighLevel MCP Server MCP

WHAT IT DOES

What ghl_update_custom_field does on GoHighLevel MCP Server

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

WHY IT NEEDS A POLICY

Why ghl_update_custom_field needs a policy

This is a Write operation—it modifies existing custom field configuration rather than irreversibly deleting it. The severity is high because custom fields are foundational schema elements in a CRM system; malicious modification could corrupt data validation or expose sensitive field configurations across many contact records, though the operation itself is technically reversible via re-update.

From the tool's definition Tool name explicitly states 'update' and description confirms it 'modify[s]' custom field 'name, description, options, and other properties.' These are reversible changes to data structure in a CRM system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ghl_update_custom_field Rate-limited

ghl_update_custom_field 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": {
    "ghl_update_custom_field": {
      "limits": [
        {
          "counter": "ghl_update_custom_field_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 GoHighLevel MCP Server, so you can run agents against it safely.

FAQ

Questions about ghl_update_custom_field

What does the ghl_update_custom_field tool do? +

Update an existing custom field by ID. Can modify name, description, options, and other properties. It is categorised as a Write tool in the GoHighLevel 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 ghl_update_custom_field? +

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

What risk level is ghl_update_custom_field? +

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

Can I rate-limit ghl_update_custom_field? +

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

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

ghl_update_custom_field is provided by the GoHighLevel MCP Server MCP server (thinkbedo/gohighlevel_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.