upload-to-custom-fields

Post the necessary fields for the API to upload files. The files need to be a buffer with the key

SERVERGoHighLevel MCP Server SOURCEdrausal/gohighlevel-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/drausal-gohighlevel-mcp/upload-to-custom-fields.md

WHAT IT DOES

What upload-to-custom-fields does on GoHighLevel MCP Server

AI agents use upload-to-custom-fields 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 upload-to-custom-fields is rated Medium

This tool creates or modifies custom field data by uploading files. While it involves file handling, the operation is reversible (files can be replaced or removed), and there is no explicit mention of deletion or irreversible destruction.

From the tool's definition The tool name 'upload-to-custom-fields' and description stating 'Post the necessary fields for the API to upload files' indicates a file upload operation that creates or modifies data. The phrase 'Post' is an HTTP method indicating data creation/modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs upload-to-custom-fields 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 upload-to-custom-fields, this is the rule to start with:

upload-to-custom-fields Rate-limited

upload-to-custom-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": {
    "upload-to-custom-fields": {
      "limits": [
        {
          "counter": "upload-to-custom-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 GoHighLevel MCP Server, apply this rule, and every upload-to-custom-fields call is checked against it from then on.

FAQ

Questions about upload-to-custom-fields

What does the upload-to-custom-fields tool do? +

Post the necessary fields for the API to upload files. The files need to be a buffer with the key. 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 upload-to-custom-fields? +

Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for upload-to-custom-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 GoHighLevel MCP Server. Nothing to install.

What risk level is upload-to-custom-fields? +

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

Can I rate-limit upload-to-custom-fields? +

Yes. Add a rate_limit block to the upload-to-custom-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 upload-to-custom-fields completely? +

Set action: deny in the PolicyLayer policy for upload-to-custom-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 upload-to-custom-fields? +

upload-to-custom-fields is provided by the GoHighLevel MCP Server MCP server (drausal/gohighlevel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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