document-viewer · IMCP - Insecure Model Context Protocol MCP

WHAT IT DOES

What document-viewer does on IMCP - Insecure Model Context Protocol

AI agents use document-viewer to create or update resources in IMCP - Insecure Model Context Protocol — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your IMCP - Insecure Model Context Protocol environment.

WHY IT NEEDS A POLICY

Why document-viewer needs a policy

The tool name includes 'viewer' suggesting read operations, but the description explicitly includes 'manage documents' which implies write capabilities such as editing metadata or modifying documents. Given IMCP is a deliberately vulnerable framework (DVWA for AI Security), this tool likely exposes insecure document management operations. The 'manage' verb elevates this above a pure Read classification.

From the tool's definition 'View and manage documents with metadata support' - 'manage' implies write/modification capabilities beyond read-only viewing

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

document-viewer Rate-limited

document-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": {
    "document-viewer": {
      "limits": [
        {
          "counter": "document-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 IMCP - Insecure Model Context Protocol, so you can run agents against it safely.

FAQ

Questions about document-viewer

What does the document-viewer tool do? +

View and manage documents with metadata support. It is categorised as a Write tool in the IMCP - Insecure Model Context Protocol MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on document-viewer? +

Register the IMCP - Insecure Model Context Protocol MCP server in PolicyLayer and add a rule for document-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 IMCP - Insecure Model Context Protocol. Nothing to install.

What risk level is document-viewer? +

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

Can I rate-limit document-viewer? +

Yes. Add a rate_limit block to the document-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 document-viewer completely? +

Set action: deny in the PolicyLayer policy for document-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 document-viewer? +

document-viewer is provided by the IMCP - Insecure Model Context Protocol MCP server (nav33n25/imcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.