mittwald_sftp_user_update
Update an existing SFTP user.
This record as markdown: /tools/mittwald-mcp-server/mittwald-sftp-user-update.md
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 mittwald_sftp_user_update is rated Medium
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
The rule that runs mittwald_sftp_user_update safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mittwald MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For mittwald_sftp_user_update, this is the rule to start with:
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.
The button opens the PolicyLayer dashboard: create your workspace, connect Mittwald MCP Server, apply this rule, and every mittwald_sftp_user_update call is checked against it from then on.
Questions about mittwald_sftp_user_update
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.
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.
mittwald_sftp_user_update is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
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.
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.
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.
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