list_models

THE RISK

Low Risk

Why list_models needs a policy

This tool retrieves and displays information about available models and their characteristics. It performs no creation, modification, deletion, or execution of external operations. The mention of pricing is still read-only metadata. Therefore it cleanly fits the Read category with low severity, as misuse would only involve accessing or displaying already-public model information.

From the tool's definition Tool name 'list_models' and description 'List available AI image generation models and their capabilities' indicate a query/retrieval operation with no side effects. The reference to pricing information further confirms this is informational lookup only.

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

POLICY

How to control list_models

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

policy.json

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

list_models 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 MeiGen AI Design MCP — 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

Related tools and policies

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All 8 MeiGen AI Design MCP tools →

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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_models

What does the list_models tool do? +

List available AI image generation models and their capabilities. For up-to-date pricing, see https://www.meigen.ai/model-comparison. It is categorised as a Read tool in the MeiGen AI Design MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_models? +

Register the MeiGen AI Design MCP server in PolicyLayer and add a rule for list_models: 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 MeiGen AI Design MCP. Nothing to install.

What risk level is list_models? +

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

Can I rate-limit list_models? +

Yes. Add a rate_limit block to the list_models 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_models completely? +

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

list_models is provided by the MeiGen AI Design MCP server (jau123/meigen-ai-design-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MeiGen AI Design MCP tool call.

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

CHECK YOUR STACK →