mittwald_sftp_user_update · Mittwald MCP Server MCP

WHAT IT DOES

What mittwald_sftp_user_update does on Mittwald MCP Server

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

WHY IT NEEDS A POLICY

Why mittwald_sftp_user_update needs a policy

This tool modifies SFTP user configurations, which is a reversible write operation. However, it affects critical authentication and access control settings, warranting high severity. Updating SFTP users could grant or restrict access to server resources, potentially affecting application availability and data confidentiality, but the changes are not irreversible (users can be reconfigured or restored).

From the tool's definition Tool name contains 'update' and description states 'Update an existing SFTP user', indicating modification of existing authentication credentials and access controls.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mittwald_sftp_user_update Rate-limited

mittwald_sftp_user_update 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": {
    "mittwald_sftp_user_update": {
      "limits": [
        {
          "counter": "mittwald_sftp_user_update_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 Mittwald MCP Server, so you can run agents against it safely.

FAQ

Questions about mittwald_sftp_user_update

What does the mittwald_sftp_user_update tool do? +

Update an existing SFTP user. It is categorised as a Write tool in the Mittwald MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mittwald_sftp_user_update? +

Register the Mittwald MCP Server MCP server in PolicyLayer and add a rule for mittwald_sftp_user_update: 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 Mittwald MCP Server. Nothing to install.

What risk level is mittwald_sftp_user_update? +

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

Can I rate-limit mittwald_sftp_user_update? +

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

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

mittwald_sftp_user_update is provided by the Mittwald MCP Server MCP server (mittwald/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.