upload_message_attachments · GoHighLevel MCP Server MCP

WHAT IT DOES

What upload_message_attachments does on GoHighLevel MCP Server

AI agents use upload_message_attachments 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 upload_message_attachments needs a policy

Uploading attachments creates new data artifacts in the CRM system and modifies the message composition state. While reversible (files can be deleted), it writes data to the system. Not destructive since deletion is possible, not execute since it doesn't run code or external operations, not financial.

From the tool's definition Tool description states "Upload file attachments for use in messages" - this creates new file objects in the messaging system that persist until manually removed.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

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"
        }
      ]
    }
  }
}

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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 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 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_message_attachments? +

Register the GoHighLevel MCP Server 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 GoHighLevel MCP Server. 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 GoHighLevel MCP Server MCP server (mindflowedstudios/mindflowed_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.