send_campaign · Campaign Monitor MCP: Risk & Policy

WHAT IT DOES

What send_campaign does on Campaign Monitor MCP

AI agents invoke send_campaign to trigger actions in Campaign Monitor MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why send_campaign needs a policy

Sending a campaign dispatches mass emails to subscribers, which is an irreversible external operation with high blast radius. While not strictly financial or data-destructive, it executes an outbound communication action that cannot be recalled once sent. Misuse could result in sending incorrect, harmful, or spam content to thousands of recipients, making severity critical.

From the tool's definition "Send or schedule a campaign for delivery" — triggers external email delivery operations to potentially large recipient lists

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_campaign Rate-limited

send_campaign 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Campaign Monitor MCP, so you can run agents against it safely.

FAQ

Questions about send_campaign

What does the send_campaign tool do? +

Send or schedule a campaign for delivery. It is categorised as a Execute tool in the Campaign Monitor MCP 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_campaign? +

Register the Campaign Monitor MCP server in PolicyLayer and add a rule for send_campaign: 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 Campaign Monitor MCP. Nothing to install.

What risk level is send_campaign? +

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

Can I rate-limit send_campaign? +

Yes. Add a rate_limit block to the send_campaign 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_campaign completely? +

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

send_campaign is provided by the Campaign Monitor MCP server (pauliowest/cmon-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.