set_client_monthly_billing · Campaign Monitor MCP

WHAT IT DOES

What set_client_monthly_billing does on Campaign Monitor MCP

AI agents use set_client_monthly_billing to commit financial operations through Campaign Monitor MCP — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why set_client_monthly_billing needs a policy

This tool modifies billing settings for a client, which is a financial operation. Misconfiguration could result in unexpected charges or financial commitments. It falls squarely in the Financial category as it directly manages monetary billing arrangements.

From the tool's definition "Configure monthly billing for a client" — directly sets billing configuration which commits financial obligations

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_client_monthly_billing Approval-gated

Any call to set_client_monthly_billing is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_client_monthly_billing": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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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 set_client_monthly_billing

What does the set_client_monthly_billing tool do? +

Configure monthly billing for a client. It is categorised as a Financial tool in the Campaign Monitor MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on set_client_monthly_billing? +

Register the Campaign Monitor MCP server in PolicyLayer and add a rule for set_client_monthly_billing: 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 set_client_monthly_billing? +

set_client_monthly_billing is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit set_client_monthly_billing? +

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

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

set_client_monthly_billing 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.