image_upload · Old Family Recipe MCP: Risk & Policy

WHAT IT DOES

What image_upload does on Old Family Recipe

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

WHY IT NEEDS A POLICY

Why image_upload needs a policy

Uploading an image creates new data in the system. While not destructive (data is not deleted or overwritten), it modifies the state of the application by adding resources. This is a Write operation.

From the tool's definition Tool provides a presigned URL to upload an image, which creates or modifies data (adds a new image resource). The description explicitly states upload capability ('upload an image').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

image_upload Rate-limited

image_upload 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": {
    "image_upload": {
      "limits": [
        {
          "counter": "image_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about image_upload

What does the image_upload tool do? +

Get a presigned URL to upload an image (recipe photo, recipe card scan). It is categorised as a Write tool in the Old Family Recipe MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on image_upload? +

Register the Old Family Recipe MCP server in PolicyLayer and add a rule for image_upload: 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 Old Family Recipe. Nothing to install.

What risk level is image_upload? +

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

Can I rate-limit image_upload? +

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

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

image_upload is provided by the Old Family Recipe MCP server (oldfamilyrecipe/ai). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.