navigate_viewer

THE RISK

Low Risk

Why navigate_viewer needs a policy

The tool name suggests navigation within an image viewer, likely a UI interaction to pan/zoom or move through artwork images. Based on context (used after inspect_artwork_image) it appears to be a read/display operation. However, the description is cut off, lowering confidence. No evidence of write, destructive, financial, or execute behavior.

From the tool's definition 'navigate_viewer' and 'Use after inspect_artwork_image when you want to draw the user' - description is truncated/uninformative

Documented attack patterns abuse exactly the kind of access navigate_viewer gives an agent:

POLICY

How to control navigate_viewer

PolicyLayer is an MCP gateway — it sits between your AI agents and Rijksmuseum Mcp+, and nothing reaches the server without passing your rules. This is the rule we recommend for navigate_viewer:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "navigate_viewer": {}
  }
}

navigate_viewer is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Rijksmuseum Mcp+ — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 24 Rijksmuseum Mcp+ tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about navigate_viewer

What does the navigate_viewer tool do? +

Use after inspect_artwork_image when you want to draw the user. It is categorised as a Read tool in the Rijksmuseum Mcp+ MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on navigate_viewer? +

Register the Rijksmuseum Mcp+ MCP server in PolicyLayer and add a rule for navigate_viewer: 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 Rijksmuseum Mcp+. Nothing to install.

What risk level is navigate_viewer? +

navigate_viewer is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit navigate_viewer? +

Yes. Add a rate_limit block to the navigate_viewer 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.

How do I block navigate_viewer completely? +

Set action: deny in the PolicyLayer policy for navigate_viewer. 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.

What MCP server provides navigate_viewer? +

navigate_viewer is provided by the Rijksmuseum Mcp+ MCP server (kintopp/rijksmuseum-mcp-plus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Rijksmuseum Mcp+ tool call.

Start from Rijksmuseum Mcp+, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →