execute_code · ContextForge MCP Gateway MCP: Risk & Policy

WHAT IT DOES

What execute_code does on ContextForge MCP Gateway

AI agents invoke execute_code to trigger actions in ContextForge MCP Gateway. 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 execute_code needs a policy

This tool runs arbitrary Python code, which can trigger external operations and side effects dependent on the code arguments provided. Although described as operating in a 'secure sandbox,' sandbox escapes are possible and the tool's primary function is code execution rather than data retrieval (Read) or reversible modification (Write).

From the tool's definition Tool name 'execute_code' combined with description 'Execute Python code in a secure sandbox environment' explicitly indicates code execution capability. The verb 'Execute' and reference to Python code execution are definitive markers of the Execute category.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

execute_code Rate-limited

execute_code 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": {
    "execute_code": {
      "limits": [
        {
          "counter": "execute_code_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 ContextForge MCP Gateway, so you can run agents against it safely.

FAQ

Questions about execute_code

What does the execute_code tool do? +

Execute Python code in a secure sandbox environment. It is categorised as a Execute tool in the ContextForge MCP Gateway 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_code? +

Register the ContextForge MCP Gateway MCP server in PolicyLayer and add a rule for execute_code: 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 ContextForge MCP Gateway. Nothing to install.

What risk level is execute_code? +

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

Can I rate-limit execute_code? +

Yes. Add a rate_limit block to the execute_code 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_code completely? +

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

execute_code is provided by the ContextForge MCP Gateway MCP server (jrmatherly/mcp-context-forge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.