geometry_build · Flex Sensor Agent MCP: Risk & Policy

WHAT IT DOES

What geometry_build does on Flex Sensor Agent

AI agents invoke geometry_build to trigger actions in Flex Sensor Agent. 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

This tool performs a computational operation (geometry building) that triggers COMSOL's geometry engine and modifies the simulation project state. While not destructive in the traditional delete sense, it executes code/operations whose effects depend on arguments (geometry parameters) and cannot be trivially reversed without project reload.

From the tool's definition The tool name 'geometry_build' indicates it constructs geometry objects within COMSOL Multiphysics. Given the server context involves flexible pressure sensor simulation with DXF analysis and contact model building, this tool likely triggers geometry…

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 Flex Sensor Agent, 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 Flex Sensor Agent 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 Flex Sensor Agent 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 Flex Sensor Agent. 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 Flex Sensor Agent MCP server (tonghui666/flex-sensor-agent-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.