powerbi_execute_dax_query · Power BI MCP for Claude MCP

WHAT IT DOES

What powerbi_execute_dax_query does on Power BI MCP for Claude

AI agents invoke powerbi_execute_dax_query to trigger actions in Power BI MCP for Claude. 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 powerbi_execute_dax_query needs a policy

This tool executes arbitrary DAX queries against live data models. While DAX queries are typically read-oriented (SELECT-like operations), the ability to execute arbitrary queries whose effects depend on supplied arguments classifies this as Execute risk.

From the tool's definition Tool description states it "Execute[s] one or more DAX queries" and can be used to query semantic models in Power BI/Fabric. DAX is a data analysis expression language that can retrieve, transform, and aggregate data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

powerbi_execute_dax_query Rate-limited

powerbi_execute_dax_query 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": {
    "powerbi_execute_dax_query": {
      "limits": [
        {
          "counter": "powerbi_execute_dax_query_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 for Claude, so you can run agents against it safely.

FAQ

Questions about powerbi_execute_dax_query

What does the powerbi_execute_dax_query tool do? +

Execute one or more DAX queries against the active Power BI semantic model through Fabric MCP. Uses the active semantic model context when no semanticModelId or artifactId is supplied. It is categorised as a Execute tool in the Power BI MCP for Claude MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on powerbi_execute_dax_query? +

Register the Power BI MCP for Claude MCP server in PolicyLayer and add a rule for powerbi_execute_dax_query: 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 for Claude. Nothing to install.

What risk level is powerbi_execute_dax_query? +

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

Can I rate-limit powerbi_execute_dax_query? +

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

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

powerbi_execute_dax_query is provided by the Power BI MCP for Claude MCP server (robertoamoreno/powerbi-mcp-claude). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.