send_sms

THE RISK

High Risk

This tool sends an SMS message to an external contact, triggering a real-world communication action. It is not merely writing data to a database — it executes an outbound message delivery to a real phone number. Misuse could result in spam, harassment, phishing, or unauthorized communications at scale given the CRM context. Severity is high due to potential for mass messaging abuse across a contact database.

From the tool's definition Send an SMS message to a contact in GoHighLevel

Documented attack patterns abuse exactly the kind of access send_sms gives an agent:

HOW TO CONTROL SEND_SMS

PolicyLayer is an MCP gateway — it sits between your AI agents and GoHighLevel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for send_sms:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_sms": {
      "limits": [
        {
          "counter": "send_sms_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

send_sms stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register GoHighLevel MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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High-risk tools in GoHighLevel MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

What does the send_sms tool do? +

Send an SMS message to a contact in GoHighLevel. It is categorised as a Execute tool in the GoHighLevel MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on send_sms? +

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

send_sms is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit send_sms? +

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

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

send_sms is provided by the GoHighLevel MCP Server MCP server (busybee3333/go-high-level-mcp-2026-complete). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every GoHighLevel MCP Server tool call.

Deterministic rules across all 566 GoHighLevel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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// WHAT SEND_SMS ON GOHIGHLEVEL MCP SERVER DOES

// THE RISK

// HOW TO CONTROL SEND_SMS

// EXPLORE