list_masked_columns
AI agents call list_masked_columns to retrieve information from Fabric Dw Mcp Cli without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool lists masked columns, which is a retrieval operation that queries metadata without modifying state or triggering external actions. Its place among sibling tools (audit settings, cache clearing, SQL execution) suggests it is a diagnostic/informational tool. The absence of a description reduces confidence slightly, but the naming convention strongly indicates read-only behavior.
From the tool's definition Tool name 'list_masked_columns' indicates a query/retrieval operation with no modification or destructive capability. The 'list' prefix is characteristic of read-only operations that enumerate or retrieve existing data.
Attacks that exploit this kind of access
list_masked_columns. It is categorised as a Read tool in the Fabric Dw Mcp Cli MCP Server, which means it retrieves data without modifying state.
Register the Fabric Dw Mcp Cli MCP server in PolicyLayer and add a rule for list_masked_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 Fabric Dw Mcp Cli. Nothing to install.
list_masked_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_masked_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_masked_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_masked_columns is provided by the Fabric Dw Mcp Cli MCP server (sdebruyn/fabric-dw-mcp-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →