auto_crop · Jgkme/kilo Image Gen MCP: Risk & Policy

WHAT IT DOES

What auto_crop does on Jgkme/kilo Image Gen

AI agents use auto_crop to create or update resources in Jgkme/kilo Image Gen — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Jgkme/kilo Image Gen environment.

WHY IT NEEDS A POLICY

Why auto_crop needs a policy

Cropping an image is a reversible write operation that modifies image content and dimensions. While the changes can theoretically be undone (original could be re-processed or recovered), the tool actively transforms image data. This is less severe than destructive operations (original file not necessarily deleted), but more impactful than simple reads.

From the tool's definition Tool description states 'Crop an image locally to a target aspect or requested dimensions' - this modifies image data by removing portions and resizing dimensions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

auto_crop Rate-limited

auto_crop 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": {
    "auto_crop": {
      "limits": [
        {
          "counter": "auto_crop_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 Jgkme/kilo Image Gen, so you can run agents against it safely.

FAQ

Questions about auto_crop

What does the auto_crop tool do? +

Crop an image locally to a target aspect or requested dimensions. It is categorised as a Write tool in the Jgkme/kilo Image Gen MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on auto_crop? +

Register the Jgkme/kilo Image Gen MCP server in PolicyLayer and add a rule for auto_crop: 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 Jgkme/kilo Image Gen. Nothing to install.

What risk level is auto_crop? +

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

Can I rate-limit auto_crop? +

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

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

auto_crop is provided by the Jgkme/kilo Image Gen MCP server (jgkme/img-gen-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.