material_list_presets

THE RISK

Low Risk

Why material_list_presets needs a policy

This tool retrieves and displays existing material presets without creating, modifying, deleting, or executing any operations. It is a read-only informational operation with minimal security risk. The blast radius if misused is negligible—an AI agent listing presets cannot damage assets, consume resources significantly, or alter editor state.

From the tool's definition Tool name 'material_list_presets' and description 'List all saved material presets available for quick application' indicate a query/retrieval operation with no side effects.

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

POLICY

How to control material_list_presets

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

policy.json

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

material_list_presets 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 Uefn — 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 →

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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 material_list_presets

What does the material_list_presets tool do? +

List all saved material presets available for quick application. It is categorised as a Read tool in the Uefn MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on material_list_presets? +

Register the Uefn MCP server in PolicyLayer and add a rule for material_list_presets: 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 Uefn. Nothing to install.

What risk level is material_list_presets? +

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

Can I rate-limit material_list_presets? +

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

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

material_list_presets is provided by the Uefn MCP server (quangdang46/uefn-verse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Uefn tool call.

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

CHECK YOUR STACK →