tom_rollback_transaction · Power BI MCP Server MCP

WHAT IT DOES

What tom_rollback_transaction does on Power BI MCP Server

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

WHY IT NEEDS A POLICY

Why tom_rollback_transaction needs a policy

This tool undoes/reverts pending local changes to the TOM (Tabular Object Model) and closes the transaction. While 'rollback' sounds destructive, it actually reverses uncommitted edits rather than permanently deleting data — it restores the model to its prior state.

From the tool's definition Roll back (UndoLocalChanges) all pending TOM model edits made since tom_begin_transaction and close the transaction.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tom_rollback_transaction Rate-limited

tom_rollback_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": {
    "tom_rollback_transaction": {
      "limits": [
        {
          "counter": "tom_rollback_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 Power BI MCP Server, so you can run agents against it safely.

FAQ

Questions about tom_rollback_transaction

What does the tom_rollback_transaction tool do? +

Roll back (UndoLocalChanges) all pending TOM model edits made since tom_begin_transaction and close the transaction. It is categorised as a Write tool in the Power BI 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 tom_rollback_transaction? +

Register the Power BI MCP Server MCP server in PolicyLayer and add a rule for tom_rollback_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 Power BI MCP Server. Nothing to install.

What risk level is tom_rollback_transaction? +

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

Can I rate-limit tom_rollback_transaction? +

Yes. Add a rate_limit block to the tom_rollback_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 tom_rollback_transaction completely? +

Set action: deny in the PolicyLayer policy for tom_rollback_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 tom_rollback_transaction? +

tom_rollback_transaction is provided by the Power BI MCP Server MCP server (sulaiman013/powerbi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.