end_transaction · MCP SAP GUI Server MCP: Risk & Policy

WHAT IT DOES

What end_transaction does on MCP SAP GUI Server

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

WHY IT NEEDS A POLICY

Why end_transaction needs a policy

An AI agent can call end_transaction faster than any human can review — one bad instruction and it creates or modifies resources in MCP SAP GUI Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

end_transaction Rate-limited

end_transaction 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": {
    "end_transaction": {
      "limits": [
        {
          "counter": "end_transaction_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 MCP SAP GUI Server, so you can run agents against it safely.

FAQ

Questions about end_transaction

What does the end_transaction tool do? +

End the current SAP transaction and close the window. It is categorised as a Write tool in the MCP SAP GUI 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 end_transaction? +

Register the MCP SAP GUI Server MCP server in PolicyLayer and add a rule for end_transaction: 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 MCP SAP GUI Server. Nothing to install.

What risk level is end_transaction? +

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

Can I rate-limit end_transaction? +

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

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

end_transaction is provided by the MCP SAP GUI Server MCP server (mario-andreschak/mcp-sap-gui). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.