get_dax_tables

THE RISK

Low Risk

Why get_dax_tables needs a policy

This tool queries and retrieves metadata about DAX calculated tables from a PowerBI model without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal blast radius—misuse would only expose existing metadata, not alter systems or data.

From the tool's definition Tool name 'get_dax_tables' and description 'View DAX calculated tables' both indicate a retrieval operation with no mutation. The verb 'View' explicitly signals read-only data access.

Documented attack patterns abuse exactly the kind of access get_dax_tables gives an agent:

POLICY

How to control get_dax_tables

PolicyLayer is an MCP gateway — it sits between your AI agents and Pbixray, and nothing reaches the server without passing your rules. This is the rule we recommend for get_dax_tables:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_dax_tables": {}
  }
}

get_dax_tables is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Pbixray — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_dax_tables

What does the get_dax_tables tool do? +

View DAX calculated tables. It is categorised as a Read tool in the Pbixray MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_dax_tables? +

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

What risk level is get_dax_tables? +

get_dax_tables is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_dax_tables? +

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

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

get_dax_tables is provided by the Pbixray MCP server (jonaolden/pbixray-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Pbixray tool call.

Start from Pbixray, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →