smart_refactor · Edit- MCP: Risk & Policy

WHAT IT DOES

What smart_refactor does on Edit-MCP

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

WHY IT NEEDS A POLICY

Why smart_refactor needs a policy

Smart refactor renames symbols across multiple files, which is a write/modify operation applied broadly. It modifies existing code but is generally reversible (e.g., via version control or the backup_and_edit sibling tool). The blast radius is high because it touches multiple files simultaneously and an incorrect rename could break code across a codebase, but it does not irreversibly delete data.

From the tool's definition 'refactor code by renaming symbols across multiple files'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

smart_refactor Rate-limited

smart_refactor 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": {
    "smart_refactor": {
      "limits": [
        {
          "counter": "smart_refactor_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 Edit-MCP, so you can run agents against it safely.

FAQ

Questions about smart_refactor

What does the smart_refactor tool do? +

Intelligently refactor code by renaming symbols across multiple files. It is categorised as a Write tool in the Edit-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 smart_refactor? +

Register the Edit- MCP server in PolicyLayer and add a rule for smart_refactor: 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 Edit-MCP. Nothing to install.

What risk level is smart_refactor? +

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

Can I rate-limit smart_refactor? +

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

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

smart_refactor is provided by the Edit- MCP server (mixelpixx/microsoft-edit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.