geometry_build · COMSOL MCP Server MCP: Risk & Policy

WHAT IT DOES

What geometry_build does on COMSOL MCP Server

AI agents invoke geometry_build to trigger actions in COMSOL 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 geometry_build needs a policy

The tool executes computational geometry operations that trigger external simulation actions in COMSOL Multiphysics. While not destructive by itself, it creates complex simulation geometry whose effects depend on input parameters. This qualifies as Execute rather than Write because it drives a complex external system (COMSOL) whose consequences are difficult to predict or reverse without expert knowledge.

From the tool's definition Tool named 'geometry_build' on COMSOL simulation server alongside other geometry manipulation tools (geometry_add_block, geometry_add_circle, geometry_add_cylinder).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

geometry_build Rate-limited

geometry_build 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": {
    "geometry_build": {
      "limits": [
        {
          "counter": "geometry_build_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 COMSOL MCP Server, so you can run agents against it safely.

FAQ

Questions about geometry_build

What does the geometry_build tool do? +

geometry_build. It is categorised as a Execute tool in the COMSOL 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 geometry_build? +

Register the COMSOL MCP Server MCP server in PolicyLayer and add a rule for geometry_build: 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 COMSOL MCP Server. Nothing to install.

What risk level is geometry_build? +

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

Can I rate-limit geometry_build? +

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

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

geometry_build is provided by the COMSOL MCP Server MCP server (zhangyoupeng1996/codex_mcp_comsol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.