roll_dice · Dice Roller MCP Server MCP: Risk & Policy

WHAT IT DOES

What roll_dice does on Dice Roller MCP Server

AI agents call roll_dice as a supporting operation in Dice Roller MCP Server workflows.

WHY IT NEEDS A POLICY

Why roll_dice needs a policy

Without any rule in front of it, every call an agent makes to roll_dice happens silently — no trail, no cap, no way to know it misbehaved until something breaks downstream.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

roll_dice Rate-limited

roll_dice gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "roll_dice": {
      "limits": [
        {
          "counter": "roll_dice_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Dice Roller MCP Server, so you can run agents against it safely.

FAQ

Questions about roll_dice

What does the roll_dice tool do? +

Roll dice using standard NdM+K notation, e.g. 2d6, 1d20+5, 4d8-2. It is categorised as a Other tool in the Dice Roller MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on roll_dice? +

Register the Dice Roller MCP Server MCP server in PolicyLayer and add a rule for roll_dice: 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 Dice Roller MCP Server. Nothing to install.

What risk level is roll_dice? +

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

Can I rate-limit roll_dice? +

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

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

roll_dice is provided by the Dice Roller MCP Server MCP server (swayam-mishra/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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