roll_drop_lowest · Dice Roller MCP Server MCP: Risk & Policy

WHAT IT DOES

What roll_drop_lowest does on Dice Roller MCP Server

AI agents invoke roll_drop_lowest to trigger actions in Dice Roller MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why roll_drop_lowest needs a policy

This tool executes a dice-rolling mechanic (NdM notation with drop-lowest logic), which is an external operation whose result depends on arguments. It has no data read/write/delete implications and no financial impact. Severity is low because misuse only produces random numbers used for tabletop gaming purposes.

From the tool's definition 'Roll NdM and drop the lowest die' — triggers a dice-rolling computation/operation with real-time random number generation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

roll_drop_lowest Rate-limited

roll_drop_lowest stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "roll_drop_lowest": {
      "limits": [
        {
          "counter": "roll_drop_lowest_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT 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_drop_lowest

What does the roll_drop_lowest tool do? +

Roll NdM and drop the lowest die, commonly used for stat rolling. It is categorised as a Execute tool in the Dice Roller MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on roll_drop_lowest? +

Register the Dice Roller MCP Server MCP server in PolicyLayer and add a rule for roll_drop_lowest: 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_drop_lowest? +

roll_drop_lowest is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit roll_drop_lowest? +

Yes. Add a rate_limit block to the roll_drop_lowest 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_drop_lowest completely? +

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

roll_drop_lowest 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.