upload_message_attachments

Upload file attachments for use in messages

SERVERGhl SOURCEghl-mcp-server

Medium RISK CLASS

Category Write

Parameters 22 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ghl/upload-message-attachments.md

WHAT IT DOES

What upload_message_attachments does on Ghl

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

Parameter	Type	Required	Description
`attachmentUrls`	array	Yes	Array of file URLs to upload as attachments
`conversationId`	string	Yes	The conversation ID to upload attachments for

Parameters from the server's own tool schema.

RISK

Why upload_message_attachments is rated Medium

Uploading attachments is a write operation that creates new data artifacts (files) within the GoHighLevel system. The severity is medium rather than high because file uploads typically have limited blast radius unless the system allows arbitrary file types or execution of uploaded content.

From the tool's definition Tool description states 'Upload file attachments for use in messages' — this creates/stores new file objects in the system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs upload_message_attachments safely

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

upload_message_attachments Rate-limited

upload_message_attachments 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_message_attachments": {
      "limits": [
        {
          "counter": "upload_message_attachments_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 Ghl, apply this rule, and every upload_message_attachments call is checked against it from then on.

FAQ

Questions about upload_message_attachments

What does the upload_message_attachments tool do? +

Upload file attachments for use in messages. It is categorised as a Write tool in the Ghl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does upload_message_attachments accept? +

upload_message_attachments accepts 2 parameters: attachmentUrls, conversationId. Required: attachmentUrls, conversationId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on upload_message_attachments? +

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

What risk level is upload_message_attachments? +

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

Can I rate-limit upload_message_attachments? +

Yes. Add a rate_limit block to the upload_message_attachments 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_message_attachments completely? +

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

upload_message_attachments is provided by the Ghl MCP server (ghl-mcp-server). 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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Govern customer-ops agents →Argument validation →Scoped token →