mcp_restore_from_backup · Local Code MCP: Risk & Policy

WHAT IT DOES

What mcp_restore_from_backup does on Local Code

AI agents use mcp_restore_from_backup 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_restore_from_backup needs a policy

This tool restores files from backups, meaning it overwrites current file contents with previously saved versions. This is a Write operation (reversible modification) rather than Destructive (irreversible deletion) because the original current state could theoretically be backed up again.

From the tool's definition Tool name 'mcp_restore_from_backup' and description 'Restore a file from a backup' indicates the tool modifies/overwrites existing files by restoring them from backup copies, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_restore_from_backup Rate-limited

mcp_restore_from_backup 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_restore_from_backup": {
      "limits": [
        {
          "counter": "mcp_restore_from_backup_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_restore_from_backup

What does the mcp_restore_from_backup tool do? +

Restore a file from a backup created by this program. 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_restore_from_backup? +

Register the Local Code MCP server in PolicyLayer and add a rule for mcp_restore_from_backup: 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_restore_from_backup? +

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

Can I rate-limit mcp_restore_from_backup? +

Yes. Add a rate_limit block to the mcp_restore_from_backup 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_restore_from_backup completely? +

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

mcp_restore_from_backup 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.