replace_background · Mcp Recraft Server MCP: Risk & Policy

WHAT IT DOES

What replace_background does on Mcp Recraft Server

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

WHY IT NEEDS A POLICY

Why replace_background needs a policy

This tool creates or modifies image data through background replacement, which is a reversible write operation. It does not delete, execute code, access financial systems, or cause irreversible changes. The severity is medium because misuse could generate misleading or inappropriate images, but the effects are non-destructive and can be corrected by running the tool again.

From the tool's definition Tool description states 'Generate an image' with background 'replaced', indicating creation/modification of image data. The operation takes an input image and produces a modified output image where the background is altered based on a prompt.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

replace_background Rate-limited

replace_background 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": {
    "replace_background": {
      "limits": [
        {
          "counter": "replace_background_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 Mcp Recraft Server, so you can run agents against it safely.

FAQ

Questions about replace_background

What does the replace_background tool do? +

Generate an image using Recraft from an input image with its detected background replaced based on the prompt.\n. It is categorised as a Write tool in the Mcp Recraft Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replace_background? +

Register the Mcp Recraft Server MCP server in PolicyLayer and add a rule for replace_background: 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 Mcp Recraft Server. Nothing to install.

What risk level is replace_background? +

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

Can I rate-limit replace_background? +

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

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

replace_background is provided by the Mcp Recraft Server MCP server (@recraft-ai/mcp-recraft-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.