List all Power BI Service workspaces accessible to the Service Principal
AI agents call list_workspaces to retrieve information from Power BI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a query operation that enumerates available workspaces without creating, modifying, deleting, or executing any operations. It has a minimal blast radius—an AI agent misuse would only result in information disclosure about accessible workspaces, not data corruption or unauthorized actions.
From the tool's definition Tool name 'list_workspaces' and description 'List all Power BI Service workspaces accessible to the Service Principal' indicate a retrieval operation with no modification or execution capability.
Attacks that exploit this kind of access
List all Power BI Service workspaces accessible to the Service Principal. It is categorised as a Read tool in the Power BI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Power BI MCP Server MCP server in PolicyLayer and add a rule for list_workspaces: 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.
list_workspaces 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_workspaces 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_workspaces. 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_workspaces 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.