capture_viewport

THE RISK

Low Risk

Why capture_viewport needs a policy

Based on the name alone, 'capture_viewport' likely takes a screenshot or captures the current view in Metashape, which would be a Read operation. However, the empty description provides no confirmation. Given the context of a photogrammetry tool, it could capture the 3D viewport as an image. Classifying as Read with low confidence due to missing description.

From the tool's definition Tool name is 'capture_viewport' but description is empty and uninformative.

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

POLICY

How to control capture_viewport

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "capture_viewport": {
      "limits": [
        {
          "counter": "capture_viewport_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

capture_viewport gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about capture_viewport

What does the capture_viewport tool do? +

capture_viewport. It is categorised as a Other tool in the Metashape MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on capture_viewport? +

Register the Metashape MCP Server MCP server in PolicyLayer and add a rule for capture_viewport: 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 Metashape MCP Server. Nothing to install.

What risk level is capture_viewport? +

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

Can I rate-limit capture_viewport? +

Yes. Add a rate_limit block to the capture_viewport 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 capture_viewport completely? +

Set action: deny in the PolicyLayer policy for capture_viewport. 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 capture_viewport? +

capture_viewport is provided by the Metashape MCP Server MCP server (jenkinsm13/metashape-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Metashape MCP Server tool call.

Start from Metashape MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →