mcp_create_change_zip · Local Code MCP: Risk & Policy

WHAT IT DOES

What mcp_create_change_zip does on Local Code

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

WHY IT NEEDS A POLICY

Why mcp_create_change_zip needs a policy

The tool creates new output files (ZIP archives with changed files and markdown reports) but does not delete, modify original sources irreversibly, or execute arbitrary code. It aggregates and exports existing data. This is a Write operation rather than Read because it generates and stores new artifacts.

From the tool's definition Creates a ZIP file containing selected changed files and generated markdown reports. The tool packages existing data into a new artifact (archive file), which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_create_change_zip Rate-limited

mcp_create_change_zip 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": {
    "mcp_create_change_zip": {
      "limits": [
        {
          "counter": "mcp_create_change_zip_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 Local Code, so you can run agents against it safely.

FAQ

Questions about mcp_create_change_zip

What does the mcp_create_change_zip tool do? +

Create a ZIP containing selected changed files and generated markdown reports. It is categorised as a Write tool in the Local Code MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mcp_create_change_zip? +

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

What risk level is mcp_create_change_zip? +

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

Can I rate-limit mcp_create_change_zip? +

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

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

mcp_create_change_zip is provided by the Local Code MCP server (js190-prog/local-code-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.