execute_python

THE RISK

High Risk

Executing arbitrary Python code is inherently an Execute action with critical severity. An AI agent could use this to run malicious scripts, modify files, exfiltrate data, or compromise the host system. The empty description reduces confidence slightly, but the tool name and server context (which explicitly mentions 'macro development' and 'debugging') make the intent clear.

From the tool's definition Tool name 'execute_python' indicates direct execution of Python code. Combined with server context (FreeCAD macro development and debugging), this tool permits arbitrary Python code execution within the FreeCAD environment.

Documented attack patterns abuse exactly the kind of access execute_python gives an agent:

HOW TO CONTROL EXECUTE_PYTHON

PolicyLayer is an MCP gateway — it sits between your AI agents and FreeCAD Robust MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for execute_python:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "execute_python": {
      "limits": [
        {
          "counter": "execute_python_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

execute_python 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.

Create a free account and register FreeCAD Robust MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More FreeCAD Robust MCP Server tools

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All 152 FreeCAD Robust MCP Server tools →

Execute tools on other servers

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Go deeper

High-risk tools in FreeCAD Robust MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the execute_python tool do? +

execute_python. It is categorised as a Execute tool in the FreeCAD Robust 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 execute_python? +

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

What risk level is execute_python? +

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

Can I rate-limit execute_python? +

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

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

execute_python is provided by the FreeCAD Robust MCP Server MCP server (spkane/freecad-addon-robust-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every FreeCAD Robust MCP Server tool call.

Deterministic rules across all 152 FreeCAD Robust MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN FREECAD ROBUST →

Free to start. No card required.

152 FreeCAD Robust MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT EXECUTE_PYTHON ON FREECAD ROBUST MCP SERVER DOES

// THE RISK

// HOW TO CONTROL EXECUTE_PYTHON

// EXPLORE