step_simulation · MCP4DRL MCP: Risk & Policy

WHAT IT DOES

What step_simulation does on MCP4DRL

AI agents invoke step_simulation to trigger actions in MCP4DRL. 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 step_simulation needs a policy

The name 'step_simulation' strongly implies advancing a simulation by one or more steps, which is an execution action (triggering state transitions in the RL environment). The description is empty, reducing confidence.

From the tool's definition Tool name 'step_simulation' on a server with sibling tools like 'run_episode', 'run_steps', 'reset_simulation', and 'run_with_checkpoints' — all suggesting simulation execution control.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

step_simulation Rate-limited

step_simulation 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": {
    "step_simulation": {
      "limits": [
        {
          "counter": "step_simulation_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 MCP4DRL, so you can run agents against it safely.

FAQ

Questions about step_simulation

What does the step_simulation tool do? +

step_simulation. It is categorised as a Execute tool in the MCP4DRL MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on step_simulation? +

Register the MCP4DRL MCP server in PolicyLayer and add a rule for step_simulation: 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 MCP4DRL. Nothing to install.

What risk level is step_simulation? +

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

Can I rate-limit step_simulation? +

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

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

step_simulation is provided by the MCP4DRL MCP server (mostapow/mcp4drl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.