AI agents call get_dax_measures to retrieve information from Pbixray without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves DAX measure definitions from a PowerBI model—a read-only metadata query with no side effects. It follows the same pattern as other 'get_' tools on the server that extract schema and structural information. No modification, deletion, code execution, or financial operations are involved.
From the tool's definition Tool name 'get_dax_measures' and sibling tools (get_dax_columns, get_dax_tables, get_metadata, etc.) all follow a 'get_*' retrieval pattern. The server description indicates it 'query[s] metadata' through PBIXRay.
Documented attack patterns abuse exactly the kind of access get_dax_measures gives an agent:
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_measures:
{
"version": "1",
"default": "deny",
"tools": {
"get_dax_measures": {}
}
}get_dax_measures is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_dax_measures. It is categorised as a Read tool in the Pbixray MCP Server, which means it retrieves data without modifying state.
Register the Pbixray MCP server in PolicyLayer and add a rule for get_dax_measures: 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.
get_dax_measures is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_dax_measures 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.
Set action: deny in the PolicyLayer policy for get_dax_measures. 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.
get_dax_measures 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.
Start from Pbixray, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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14 Pbixray tools catalogued and risk-classified — across an index of 43,000+ MCP servers.