unsubscribe_from_list

THE RISK

Medium Risk

Why unsubscribe_from_list needs a policy

This tool modifies user subscription status by removing them from a list. While potentially reversible (users could be re-subscribed), it has a high blast radius because misuse could unsubscribe large numbers of users from marketing lists, causing significant business impact. It is a Write operation as it modifies existing user data/relationships rather than deleting them outright.

From the tool's definition Unsubscribe users from a specific list

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

POLICY

How to control unsubscribe_from_list

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "unsubscribe_from_list": {
      "limits": [
        {
          "counter": "unsubscribe_from_list_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

unsubscribe_from_list 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.

Create a free account and register Iterable 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Iterable MCP Server tools

Destructive bulk_delete_catalog_items Bulk delete catalog items by their IDs Destructive cancel_campaign Cancel a scheduled or recurring campaign Destructive cancel_export_job Cancel a queued or running export job created with Destructive delete_catalog Delete a catalog Destructive delete_catalog_item Delete a specific catalog item by ID Destructive delete_list Delete a user list Destructive delete_snippet Delete a snippet by ID (numeric) or name (string) Destructive delete_templates Delete one or more templates by ID

All 78 Iterable MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about unsubscribe_from_list

What does the unsubscribe_from_list tool do? +

Unsubscribe users from a specific list. It is categorised as a Write tool in the Iterable 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 unsubscribe_from_list? +

Register the Iterable MCP Server MCP server in PolicyLayer and add a rule for unsubscribe_from_list: 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 Iterable MCP Server. Nothing to install.

What risk level is unsubscribe_from_list? +

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

Can I rate-limit unsubscribe_from_list? +

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

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

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

Enforce policy on every Iterable MCP Server tool call.

Start from Iterable MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →