update_custom_value

Update an existing custom value

SERVERGoHighLevel MCP Server SOURCEbasicmachines-co/open-ghl-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/basicmachines-co-open-ghl-mcp/update-custom-value.md

WHAT IT DOES

What update_custom_value does on GoHighLevel MCP Server

AI agents use update_custom_value 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.

RISK

Why update_custom_value is rated Medium

This tool modifies data reversibly—it updates an existing custom value rather than creating new data or deleting it. Updates can typically be undone by applying a different update, making this a Write operation. Severity is medium because misuse could corrupt or alter CRM data fields that affect business operations, but the blast radius is limited to custom value fields and reversible.

From the tool's definition Tool name is 'update_custom_value' with description 'Update an existing custom value'. The verb 'update' indicates modification of existing data in the GoHighLevel CRM system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_custom_value safely

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

update_custom_value Rate-limited

update_custom_value 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": {
    "update_custom_value": {
      "limits": [
        {
          "counter": "update_custom_value_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 GoHighLevel MCP Server, apply this rule, and every update_custom_value call is checked against it from then on.

FAQ

Questions about update_custom_value

What does the update_custom_value tool do? +

Update an existing custom value. 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 update_custom_value? +

Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for update_custom_value: 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 update_custom_value? +

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

Can I rate-limit update_custom_value? +

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

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

update_custom_value is provided by the GoHighLevel MCP Server MCP server (basicmachines-co/open-ghl-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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