axle_rename · Axle MCP: Risk & Policy

WHAT IT DOES

What axle_rename does on Axle

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

WHY IT NEEDS A POLICY

Why axle_rename needs a policy

Based on the tool name 'axle_rename', this likely performs a renaming operation on Lean theorems or proof elements, which is a reversible write/modification action. However, since the description is empty, confidence is low. Given the sibling tools context (proof engineering, theorem transformation), renaming is likely a write operation with medium severity as it modifies proof artifacts.

From the tool's definition Tool name 'axle_rename' suggests renaming operations; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

axle_rename Rate-limited

axle_rename 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": {
    "axle_rename": {
      "limits": [
        {
          "counter": "axle_rename_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 Axle, so you can run agents against it safely.

FAQ

Questions about axle_rename

What does the axle_rename tool do? +

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

How do I enforce a policy on axle_rename? +

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

What risk level is axle_rename? +

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

Can I rate-limit axle_rename? +

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

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

axle_rename is provided by the Axle MCP server (vilin97/axle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.