Return the view rendered as a PNG image (base64 encoded).
AI agents call query_view_image to retrieve information from Tableau MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and renders existing visualization data in image format. It has no capacity to modify Tableau objects, execute arbitrary operations, or affect system state. The operation is read-only and returns a representation of data already accessible through the view.
From the tool's definition Tool returns a rendered view as a PNG image (base64 encoded); no modification, deletion, or execution of code/commands occurs. Functionally equivalent to 'download' or 'get' operations that retrieve existing data without side effects.
Attacks that exploit this kind of access
Return the view rendered as a PNG image (base64 encoded). It is categorised as a Read tool in the Tableau MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tableau MCP Server MCP server in PolicyLayer and add a rule for query_view_image: 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 Tableau MCP Server. Nothing to install.
query_view_image 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 query_view_image 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 query_view_image. 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.
query_view_image is provided by the Tableau MCP Server MCP server (lokimcpuniverse/tableau-mcp-server). 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.
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