bulc_stop_evac · BULC Building Designer MCP: Risk & Policy

WHAT IT DOES

What bulc_stop_evac does on BULC Building Designer

AI agents invoke bulc_stop_evac to trigger actions in BULC Building Designer. 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 bulc_stop_evac needs a policy

This tool executes a command to stop an ongoing simulation process. It is not reading data (Read), creating/modifying reversibly (Write), or destructively deleting data (Destructive). It triggers an external operation whose effects depend on the state of the running simulation.

From the tool's definition Tool name 'bulc_stop_evac' and description 'Stop a running evacuation simulation' indicate triggering an action that halts an external operation (fire simulation software).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bulc_stop_evac Rate-limited

bulc_stop_evac 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": {
    "bulc_stop_evac": {
      "limits": [
        {
          "counter": "bulc_stop_evac_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 BULC Building Designer, so you can run agents against it safely.

FAQ

Questions about bulc_stop_evac

What does the bulc_stop_evac tool do? +

Stop a running evacuation simulation. It is categorised as a Execute tool in the BULC Building Designer MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on bulc_stop_evac? +

Register the BULC Building Designer MCP server in PolicyLayer and add a rule for bulc_stop_evac: 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 BULC Building Designer. Nothing to install.

What risk level is bulc_stop_evac? +

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

Can I rate-limit bulc_stop_evac? +

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

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

bulc_stop_evac is provided by the BULC Building Designer MCP server (using76/bulc_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.