create_voucher_position · Sevdesk MCP: Risk & Policy

WHAT IT DOES

What create_voucher_position does on Sevdesk

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

WHY IT NEEDS A POLICY

Why create_voucher_position needs a policy

This tool writes a new voucher position entry in the accounting system. It is reversible (the position can be deleted later), so it falls under Write rather than Destructive. In an accounting context, adding incorrect voucher positions could cause financial reporting issues, giving it medium severity.

From the tool's definition 'Create a new position on a voucher' — creates a new record (position) on an existing voucher

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_voucher_position Rate-limited

create_voucher_position 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": {
    "create_voucher_position": {
      "limits": [
        {
          "counter": "create_voucher_position_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Sevdesk, so you can run agents against it safely.

FAQ

Questions about create_voucher_position

What does the create_voucher_position tool do? +

Create a new position on a voucher. It is categorised as a Write tool in the Sevdesk MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_voucher_position? +

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

What risk level is create_voucher_position? +

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

Can I rate-limit create_voucher_position? +

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

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

create_voucher_position is provided by the Sevdesk MCP server (codestra/sevdesk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.