list_layouts

THE RISK

Low Risk

Why list_layouts needs a policy

This tool queries and returns information about available slide layouts without creating, modifying, deleting, or executing any operations. It is purely informational and poses minimal risk if misused by an AI agent.

From the tool's definition Tool description states 'List all available slide layouts' — a retrieval operation with no side effects. The verb 'list' and the read-only nature of enumerating configuration options align with the Read category.

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

POLICY

How to control list_layouts

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

policy.json

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

list_layouts 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 Marp 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.

CAP THIS TOOL →

Free to start. No card required.

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_layouts

What does the list_layouts tool do? +

List all available slide layouts with their required/optional parameters. It is categorised as a Read tool in the Marp MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_layouts? +

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

What risk level is list_layouts? +

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

Can I rate-limit list_layouts? +

Yes. Add a rate_limit block to the list_layouts 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_layouts completely? +

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

list_layouts is provided by the Marp MCP Server MCP server (masaki39/marp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Marp MCP Server tool call.

Start from Marp 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 →