generate_image_batch · Imagen MCP: Risk & Policy

WHAT IT DOES

What generate_image_batch does on Imagen

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

WHY IT NEEDS A POLICY

Why generate_image_batch needs a policy

Based on the tool name and server context (image generation via OpenAI/Google Gemini APIs), this tool likely generates multiple images in batch, which is a Write operation (creating new data). However, the empty description reduces confidence. Severity is medium due to potential API cost implications from batch operations, though financial transactions are not the primary function.

From the tool's definition Tool name 'generate_image_batch' implies batch image generation; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_image_batch Rate-limited

generate_image_batch 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_image_batch": {
      "limits": [
        {
          "counter": "generate_image_batch_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 Imagen, so you can run agents against it safely.

FAQ

Questions about generate_image_batch

What does the generate_image_batch tool do? +

generate_image_batch. It is categorised as a Write tool in the Imagen 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_image_batch? +

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

What risk level is generate_image_batch? +

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

Can I rate-limit generate_image_batch? +

Yes. Add a rate_limit block to the generate_image_batch 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_image_batch completely? +

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

generate_image_batch is provided by the Imagen MCP server (michaeljabbour/imagen-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.