generate_email_header_image · Mcp Media Engine MCP

WHAT IT DOES

What generate_email_header_image does on Mcp Media Engine

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

WHY IT NEEDS A POLICY

Why generate_email_header_image needs a policy

This tool creates new digital assets (images) which are Write operations. Severity is medium rather than high because: (1) generated images are reversible—they can be replaced or deleted; (2) the blast radius is limited to visual marketing content rather than core business data; (3) misuse would result in unwanted but non-destructive image generation.

From the tool's definition Tool generates and creates new image assets ('Create an AI-generated header image'). The verb 'generate' and context of 'marketing emails and newsletters' indicate this produces new media content that is then persisted for use.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_email_header_image Rate-limited

generate_email_header_image 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": {
    "generate_email_header_image": {
      "limits": [
        {
          "counter": "generate_email_header_image_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 Media Engine, so you can run agents against it safely.

FAQ

Questions about generate_email_header_image

What does the generate_email_header_image tool do? +

Create an AI-generated header image for marketing emails and newsletters. It is categorised as a Write tool in the Mcp Media Engine MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_email_header_image? +

Register the Mcp Media Engine MCP server in PolicyLayer and add a rule for generate_email_header_image: 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 Media Engine. Nothing to install.

What risk level is generate_email_header_image? +

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

Can I rate-limit generate_email_header_image? +

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

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

generate_email_header_image is provided by the Mcp Media Engine MCP server (tr1ckymag1ca1/mcp-media-engine). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.