ftp_rollback · Ftp MCP: Risk & Policy

WHAT IT DOES

What ftp_rollback does on Ftp

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

WHY IT NEEDS A POLICY

Why ftp_rollback needs a policy

ftp_rollback restores files from a snapshot, which is a write/overwrite operation on the remote filesystem. While framed as a safety mechanism, it overwrites current file contents with a prior state — this is a reversible write (you could roll forward again) rather than a destruction of data. However, misuse could overwrite important changes made since the snapshot, giving it a high severity blast radius.

From the tool's definition Undo a previous file mutation by restoring it from a system-generated snapshot

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ftp_rollback Rate-limited

ftp_rollback 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": {
    "ftp_rollback": {
      "limits": [
        {
          "counter": "ftp_rollback_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 Ftp, so you can run agents against it safely.

FAQ

Questions about ftp_rollback

What does the ftp_rollback tool do? +

Undo a previous file mutation by restoring it from a system-generated snapshot. This provides safety during complex refactoring tasks. It is categorised as a Write tool in the Ftp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ftp_rollback? +

Register the Ftp MCP server in PolicyLayer and add a rule for ftp_rollback: 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 Ftp. Nothing to install.

What risk level is ftp_rollback? +

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

Can I rate-limit ftp_rollback? +

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

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

ftp_rollback is provided by the Ftp MCP server (kynlos/ftp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

ftp_rollback is one line of Ftp's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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