list_child_folders

THE RISK

Low Risk

Why list_child_folders needs a policy

This tool queries and retrieves a hierarchical structure of message template folders. It performs a read-only operation that has no side effects, does not modify data, and does not trigger external actions. The action is informational only, consistent with the Read category for list/retrieve operations.

From the tool's definition Tool name 'list_child_folders' and description 'List child folders of a message template folder' indicate a retrieval operation with no modification or deletion of data.

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

POLICY

How to control list_child_folders

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

policy.json

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

list_child_folders 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 Frontapp 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.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_child_folders

What does the list_child_folders tool do? +

List child folders of a message template folder. It is categorised as a Read tool in the Frontapp MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_child_folders? +

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

What risk level is list_child_folders? +

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

Can I rate-limit list_child_folders? +

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

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

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

Enforce policy on every Frontapp MCP Server tool call.

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

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