refine_code_tool · MCP Code Reviewer MCP: Risk & Policy

WHAT IT DOES

What refine_code_tool does on MCP Code Reviewer

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

WHY IT NEEDS A POLICY

Why refine_code_tool needs a policy

The tool performs code refinement/modification which is reversible (Write category), not destructive. Severity is medium because code changes could introduce bugs or break functionality, but the server explicitly mentions 'human-in-the-loop confirmation' and 'automatic backups' which mitigate risk.

From the tool's definition Tool name 'refine_code_tool' combined with server context describing 'automated fix proposals' and 'file modifications through automatic backups and path validation' indicates the tool modifies code files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

refine_code_tool Rate-limited

refine_code_tool 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": {
    "refine_code_tool": {
      "limits": [
        {
          "counter": "refine_code_tool_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 MCP Code Reviewer, so you can run agents against it safely.

FAQ

Questions about refine_code_tool

What does the refine_code_tool tool do? +

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

How do I enforce a policy on refine_code_tool? +

Register the MCP Code Reviewer MCP server in PolicyLayer and add a rule for refine_code_tool: 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 MCP Code Reviewer. Nothing to install.

What risk level is refine_code_tool? +

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

Can I rate-limit refine_code_tool? +

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

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

refine_code_tool is provided by the MCP Code Reviewer MCP server (whtan410/mcp_code_review). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.