list_theme_presets

THE RISK

Low Risk

Why list_theme_presets needs a policy

This tool retrieves and displays a list of predefined theme presets without modifying any game state, user data, or executing commands. It is a straightforward query operation that returns informational data only.

From the tool's definition Tool name 'list_theme_presets' and description 'List all available theme presets with their colors and styles' indicates a retrieval operation with no side effects.

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

POLICY

How to control list_theme_presets

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

policy.json

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

list_theme_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 DMCP — 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_theme_presets

What does the list_theme_presets tool do? +

List all available theme presets with their colors and styles. It is categorised as a Read tool in the DMCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_theme_presets? +

Register the D MCP server in PolicyLayer and add a rule for list_theme_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 DMCP. Nothing to install.

What risk level is list_theme_presets? +

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

Can I rate-limit list_theme_presets? +

Yes. Add a rate_limit block to the list_theme_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 list_theme_presets completely? +

Set action: deny in the PolicyLayer policy for list_theme_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 list_theme_presets? +

list_theme_presets is provided by the D MCP server (shawnrushefsky/dmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every DMCP tool call.

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

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