cfd_fluidx3d_compile · FreeCAD MCP: Risk & Policy

WHAT IT DOES

What cfd_fluidx3d_compile does on FreeCAD MCP

AI agents invoke cfd_fluidx3d_compile to trigger actions in FreeCAD MCP. 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 cfd_fluidx3d_compile needs a policy

Compiling and executing a CFD solver can consume significant computational resources, generate large temporary files, and potentially expose system vulnerabilities depending on how inputs are validated. While not destructive (results are typically ephemeral simulation outputs), this is Execute-category because it runs external code/processes.

From the tool's definition Tool name 'cfd_fluidx3d_compile' indicates compilation of FluidX3D (a computational fluid dynamics solver). The 'compile' action suggests code compilation or build execution.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cfd_fluidx3d_compile Rate-limited

cfd_fluidx3d_compile 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": {
    "cfd_fluidx3d_compile": {
      "limits": [
        {
          "counter": "cfd_fluidx3d_compile_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 FreeCAD MCP, so you can run agents against it safely.

FAQ

Questions about cfd_fluidx3d_compile

What does the cfd_fluidx3d_compile tool do? +

cfd_fluidx3d_compile. It is categorised as a Execute tool in the FreeCAD MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cfd_fluidx3d_compile? +

Register the FreeCAD MCP server in PolicyLayer and add a rule for cfd_fluidx3d_compile: 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 FreeCAD MCP. Nothing to install.

What risk level is cfd_fluidx3d_compile? +

cfd_fluidx3d_compile is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit cfd_fluidx3d_compile? +

Yes. Add a rate_limit block to the cfd_fluidx3d_compile 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 cfd_fluidx3d_compile completely? +

Set action: deny in the PolicyLayer policy for cfd_fluidx3d_compile. 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 cfd_fluidx3d_compile? +

cfd_fluidx3d_compile is provided by the FreeCAD MCP server (sandraschi/freecad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.