create_image_viewer · MCP Document Converter MCP

WHAT IT DOES

What create_image_viewer does on MCP Document Converter

AI agents use create_image_viewer to create or update resources in MCP Document Converter — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Document Converter environment.

WHY IT NEEDS A POLICY

Why create_image_viewer needs a policy

This tool creates (generates) new HTML content, which is a reversible write operation. It does not execute arbitrary code, delete data, or move money. Severity is medium because generated HTML could potentially be malicious if misused, but the operation itself is reversible and the blast radius is limited to the HTML output artifact.

From the tool's definition Tool name 'create_image_viewer' and description 'Create HTML viewer for images with metadata' indicate file/content creation. The tool generates new HTML output based on image inputs.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_image_viewer Rate-limited

create_image_viewer stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_image_viewer": {
      "limits": [
        {
          "counter": "create_image_viewer_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Document Converter, so you can run agents against it safely.

FAQ

Questions about create_image_viewer

What does the create_image_viewer tool do? +

Create HTML viewer for images with metadata. It is categorised as a Write tool in the MCP Document Converter MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_image_viewer? +

Register the MCP Document Converter MCP server in PolicyLayer and add a rule for create_image_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 MCP Document Converter. Nothing to install.

What risk level is create_image_viewer? +

create_image_viewer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_image_viewer? +

Yes. Add a rate_limit block to the create_image_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 create_image_viewer completely? +

Set action: deny in the PolicyLayer policy for create_image_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 create_image_viewer? +

create_image_viewer is provided by the MCP Document Converter MCP server (kittolau/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.