short_rest · DM20 Protocol MCP: Risk & Policy

WHAT IT DOES

What short_rest does on DM20 Protocol

AI agents use short_rest to create or update resources in DM20 Protocol — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DM20 Protocol environment.

WHY IT NEEDS A POLICY

Why short_rest needs a policy

In D&D 5e, a short rest is a game mechanic that allows characters to recover hit points and reset certain abilities. This would most likely modify character state (HP, spell slots, abilities) in the campaign tracker — a reversible write operation.

From the tool's definition Tool name 'short_rest' in a D&D campaign management server; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

short_rest Rate-limited

short_rest stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "short_rest": {
      "limits": [
        {
          "counter": "short_rest_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches DM20 Protocol, so you can run agents against it safely.

FAQ

Questions about short_rest

What does the short_rest tool do? +

short_rest. It is categorised as a Write tool in the DM20 Protocol MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on short_rest? +

Register the DM20 Protocol MCP server in PolicyLayer and add a rule for short_rest: 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 DM20 Protocol. Nothing to install.

What risk level is short_rest? +

short_rest is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit short_rest? +

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

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

short_rest is provided by the DM20 Protocol MCP server (polloinfilzato/dm20-protocol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.