cropImage · ImageEditorMCPServer MCP: Risk & Policy

WHAT IT DOES

What cropImage does on ImageEditorMCPServer

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

WHY IT NEEDS A POLICY

Why cropImage needs a policy

cropImage modifies an image by trimming it to a specified region. This is a Write operation as it transforms/modifies data. It is reversible in principle (the original can be retained), so it does not qualify as Destructive. Severity is medium because misuse could result in unintended loss of image content if originals are overwritten.

From the tool's definition 「指定された範囲で画像をトリミングします」(Crops the image to the specified range)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cropImage Rate-limited

cropImage 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": {
    "cropImage": {
      "limits": [
        {
          "counter": "cropimage_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 ImageEditorMCPServer, so you can run agents against it safely.

FAQ

Questions about cropImage

What does the cropImage tool do? +

指定された範囲で画像をトリミングします。. It is categorised as a Write tool in the ImageEditorMCPServer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cropImage? +

Register the ImageEditorMCPServer MCP server in PolicyLayer and add a rule for cropImage: 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 ImageEditorMCPServer. Nothing to install.

What risk level is cropImage? +

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

Can I rate-limit cropImage? +

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

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

cropImage is provided by the ImageEditorMCPServer MCP server (kentakki416/image-editor-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.