bulc_open_evac_viewer · BULC Building Designer MCP

WHAT IT DOES

What bulc_open_evac_viewer does on BULC Building Designer

AI agents invoke bulc_open_evac_viewer 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_open_evac_viewer needs a policy

This tool opens a viewer window, which is an external operation that triggers a UI action in the BULC fire simulation software. It doesn't read, write, or destroy data, but it does execute an external operation (launching/opening a window). The blast radius is low as it's essentially a display action with no data modification.

From the tool's definition 'Open the 3D evacuation result viewer window' — triggers an external UI/viewer operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bulc_open_evac_viewer Rate-limited

bulc_open_evac_viewer 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_open_evac_viewer": {
      "limits": [
        {
          "counter": "bulc_open_evac_viewer_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_open_evac_viewer

What does the bulc_open_evac_viewer tool do? +

Open the 3D evacuation result viewer window. 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_open_evac_viewer? +

Register the BULC Building Designer MCP server in PolicyLayer and add a rule for bulc_open_evac_viewer: 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_open_evac_viewer? +

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

Can I rate-limit bulc_open_evac_viewer? +

Yes. Add a rate_limit block to the bulc_open_evac_viewer 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_open_evac_viewer completely? +

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

bulc_open_evac_viewer 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.