cfd_create_domain · FreeCAD MCP: Risk & Policy

WHAT IT DOES

What cfd_create_domain does on FreeCAD MCP

AI agents use cfd_create_domain to create or update resources in FreeCAD MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FreeCAD MCP environment.

WHY IT NEEDS A POLICY

Why cfd_create_domain needs a policy

The 'create' prefix strongly implies a Write operation that sets up a new CFD simulation domain. Based on sibling tool 'cfd_build_case' and server context of fluid simulation, this likely creates/writes simulation domain configuration. Empty description lowers confidence; no evidence of destructive, financial, or execution behavior.

From the tool's definition Tool name 'cfd_create_domain' suggests creating a CFD (Computational Fluid Dynamics) domain; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cfd_create_domain Rate-limited

cfd_create_domain stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_create_domain": {
      "limits": [
        {
          "counter": "cfd_create_domain_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_create_domain

What does the cfd_create_domain tool do? +

cfd_create_domain. It is categorised as a Write tool in the FreeCAD MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cfd_create_domain? +

Register the FreeCAD MCP server in PolicyLayer and add a rule for cfd_create_domain: 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_create_domain? +

cfd_create_domain is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit cfd_create_domain? +

Yes. Add a rate_limit block to the cfd_create_domain 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_create_domain completely? +

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

cfd_create_domain 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.