desktop_execute_dax · Power BI MCP Server MCP: Risk & Policy

WHAT IT DOES

What desktop_execute_dax does on Power BI MCP Server

AI agents invoke desktop_execute_dax to trigger actions in Power BI MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why desktop_execute_dax needs a policy

This tool executes code (DAX queries) against a live Power BI model, which is an Execute category action. DAX queries can perform complex data transformations, aggregations, and calculations with side effects dependent on the query content.

From the tool's definition Tool name 'desktop_execute_dax' and description 'Execute a DAX query against the connected Power BI Desktop model' explicitly indicate execution of queries against live data models.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

desktop_execute_dax Rate-limited

desktop_execute_dax stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "desktop_execute_dax": {
      "limits": [
        {
          "counter": "desktop_execute_dax_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 desktop_execute_dax

What does the desktop_execute_dax tool do? +

Execute a DAX query against the connected Power BI Desktop model. It is categorised as a Execute tool in the Power BI MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on desktop_execute_dax? +

Register the Power BI MCP Server MCP server in PolicyLayer and add a rule for desktop_execute_dax: 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 desktop_execute_dax? +

desktop_execute_dax is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit desktop_execute_dax? +

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

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

desktop_execute_dax 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.