rewrite_script · GameDevBench MCP: Risk & Policy

WHAT IT DOES

What rewrite_script does on GameDevBench MCP

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

WHY IT NEEDS A POLICY

Why rewrite_script needs a policy

The tool 'rewrite_script' performs reversible modification of script files within the Godot game engine context. While not irreversible (Destructive), this constitutes a Write operation as it alters existing data. Severity is high because malicious script rewrites could inject malicious code, compromise game logic, or sabotage development work.

From the tool's definition Tool name 'rewrite_script' indicates modification of scripts. Server context shows tools like 'create_script' and 'delete_script' suggesting file manipulation capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rewrite_script Rate-limited

rewrite_script 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": {
    "rewrite_script": {
      "limits": [
        {
          "counter": "rewrite_script_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches GameDevBench MCP, so you can run agents against it safely.

FAQ

Questions about rewrite_script

What does the rewrite_script tool do? +

rewrite_script. It is categorised as a Write tool in the GameDevBench 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 rewrite_script? +

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

What risk level is rewrite_script? +

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

Can I rate-limit rewrite_script? +

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

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

rewrite_script is provided by the GameDevBench MCP server (seeleai/gamedevbench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.