ftp_mkdir · Ftp MCP: Risk & Policy

WHAT IT DOES

What ftp_mkdir does on Ftp

AI agents use ftp_mkdir 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_mkdir needs a policy

Creating directories is a reversible write operation—directories can be deleted. This is less severe than destructive actions (which cannot be undone) but more severe than read-only queries. Severity is medium because widespread directory creation could consume disk space or disrupt remote filesystem organization, but the impact depends on what is created and where.

From the tool's definition Tool name 'ftp_mkdir' and description 'Create a new directory structure on the remote server' directly indicate directory creation, which modifies remote filesystem state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ftp_mkdir Rate-limited

ftp_mkdir 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_mkdir": {
      "limits": [
        {
          "counter": "ftp_mkdir_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_mkdir

What does the ftp_mkdir tool do? +

Create a new directory structure on the remote server. Supports nested creation (mkdir -p). 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_mkdir? +

Register the Ftp MCP server in PolicyLayer and add a rule for ftp_mkdir: 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_mkdir? +

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

Can I rate-limit ftp_mkdir? +

Yes. Add a rate_limit block to the ftp_mkdir 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_mkdir completely? +

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

ftp_mkdir 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.