get_in_app_messages

THE RISK

Low Risk

Why get_in_app_messages needs a policy

This tool retrieves existing in-app messages for a specific user. The verb 'get' and the absence of any language suggesting modification, deletion, or execution of operations confirm this is a read-only operation. There is no blast radius from an AI agent querying user message data, making severity low.

From the tool's definition Tool name is 'get_in_app_messages' and description states 'Get in-app messages for a user' — both indicate data retrieval with no modification or side effects.

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

POLICY

How to control get_in_app_messages

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 get_in_app_messages:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_in_app_messages": {}
  }
}

get_in_app_messages is read-only, so it stays allowed — but 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.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about get_in_app_messages

What does the get_in_app_messages tool do? +

Get in-app messages for a user. It is categorised as a Read tool in the Iterable MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_in_app_messages? +

Register the Iterable MCP Server MCP server in PolicyLayer and add a rule for get_in_app_messages: 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 get_in_app_messages? +

get_in_app_messages is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_in_app_messages? +

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

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

get_in_app_messages 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 →