resubscribeContact · Mailmodo MCP: Risk & Policy

WHAT IT DOES

What resubscribeContact does on Mailmodo

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

WHY IT NEEDS A POLICY

Why resubscribeContact needs a policy

Resubscribing a contact modifies their subscription state in the system, reversing a prior unsubscribe action. This is a reversible write operation (the contact can be unsubscribed again). It does not delete data, execute code, or involve finances. Severity is medium because misuse could re-enroll contacts in email campaigns without their explicit consent, potentially violating privacy regulations like GDPR.

From the tool's definition 'Resubscribe contact in mailmodo' — restores a previously unsubscribed contact's subscription status

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resubscribeContact Rate-limited

resubscribeContact 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": {
    "resubscribeContact": {
      "limits": [
        {
          "counter": "resubscribecontact_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about resubscribeContact

What does the resubscribeContact tool do? +

Resubscribe contact in mailmodo. It is categorised as a Write tool in the Mailmodo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on resubscribeContact? +

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

What risk level is resubscribeContact? +

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

Can I rate-limit resubscribeContact? +

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

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

resubscribeContact is provided by the Mailmodo MCP server (mailmodo/mailmodo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.