create_python_script · Avizo MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_python_script does on Avizo MCP Server

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

WHY IT NEEDS A POLICY

Why create_python_script needs a policy

This tool creates a new Python script file, which is a write operation that creates data reversibly. However, the severity is elevated to 'high' rather than 'medium' because: (1) the created script can subsequently be executed by sibling tools like 'run_avizo_python', potentially causing side effects; (2) Avizo is a scientific visualization and data processing application where malicious scripts could corrupt…

From the tool's definition Tool name is 'create_python_script' and description states it 'Create[s] a Python script', which is a write operation. The script is created 'under the MCP work directory' as a persistent artifact.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_python_script Rate-limited

create_python_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": {
    "create_python_script": {
      "limits": [
        {
          "counter": "create_python_script_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 Avizo MCP Server, so you can run agents against it safely.

FAQ

Questions about create_python_script

What does the create_python_script tool do? +

Create a Python script under the MCP work directory for Avizo Python runs. It is categorised as a Write tool in the Avizo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_python_script? +

Register the Avizo MCP Server MCP server in PolicyLayer and add a rule for create_python_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 Avizo MCP Server. Nothing to install.

What risk level is create_python_script? +

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

Can I rate-limit create_python_script? +

Yes. Add a rate_limit block to the create_python_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 create_python_script completely? +

Set action: deny in the PolicyLayer policy for create_python_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 create_python_script? +

create_python_script is provided by the Avizo MCP Server MCP server (songyb1998/avizo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.