mcp_create_full_snapshot_zip · Local Code MCP: Risk & Policy

WHAT IT DOES

What mcp_create_full_snapshot_zip does on Local Code

AI agents use mcp_create_full_snapshot_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_full_snapshot_zip needs a policy

This tool creates a new archive file containing project state. It is Write-category because it creates persistent data (the ZIP file) without destroying anything. Severity is medium rather than high because: (1) the operation is reversible (the ZIP can be deleted), (2) it does not modify the underlying source code, only packages a copy of it, and (3) the context ('Safe local MCP server') and sibling tools…

From the tool's definition Tool creates a full snapshot ZIP archive; description explicitly states 'Create a full snapshot ZIP'. ZIP creation is a data output/packaging operation that modifies (creates) new files on the local system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_create_full_snapshot_zip Rate-limited

mcp_create_full_snapshot_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_full_snapshot_zip": {
      "limits": [
        {
          "counter": "mcp_create_full_snapshot_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_full_snapshot_zip

What does the mcp_create_full_snapshot_zip tool do? +

Create a full snapshot ZIP, excluding ignored directories. 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_full_snapshot_zip? +

Register the Local Code MCP server in PolicyLayer and add a rule for mcp_create_full_snapshot_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_full_snapshot_zip? +

mcp_create_full_snapshot_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_full_snapshot_zip? +

Yes. Add a rate_limit block to the mcp_create_full_snapshot_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_full_snapshot_zip completely? +

Set action: deny in the PolicyLayer policy for mcp_create_full_snapshot_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_full_snapshot_zip? +

mcp_create_full_snapshot_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.