AI agents call list_columns to retrieve information from PowerBI Analyst MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool lists columns, presumably from Power BI tables or datasets. This is a read-only query operation that retrieves metadata without modifying, executing, or deleting anything. Even if misused by an AI agent, listing columns cannot directly harm data integrity or systems. Confidence is slightly reduced due to empty description, but the name and server context strongly indicate Read classification.
From the tool's definition Tool name 'list_columns' indicates a listing/retrieval operation with no side effects. Server context shows this is part of a Power BI browsing/querying suite where sibling tools include 'list_' operations (list_apps, list_datasets, list_measures,…
Documented attack patterns abuse exactly the kind of access list_columns gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PowerBI Analyst MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_columns:
{
"version": "1",
"default": "deny",
"tools": {
"list_columns": {}
}
}list_columns is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
list_columns. It is categorised as a Read tool in the PowerBI Analyst MCP MCP Server, which means it retrieves data without modifying state.
Register the PowerBI Analyst MCP server in PolicyLayer and add a rule for list_columns: 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 PowerBI Analyst MCP. Nothing to install.
list_columns 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 list_columns 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 list_columns. 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.
list_columns is provided by the PowerBI Analyst MCP server (mbrummerstedt/powerbi-analyst-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from PowerBI Analyst MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
12 PowerBI Analyst MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.