comfy_get_output_images

THE RISK

Low Risk

Why comfy_get_output_images needs a policy

This tool queries and returns data about generated images without modifying, deleting, or executing any operations. It is a passive read operation analogous to 'list' or 'get' operations. The severity is low because retrieving image metadata or filenames poses minimal risk even if accessed by an untrusted agent.

From the tool's definition Tool name 'comfy_get_output_images' and description 'List recent output images from ComfyUI' indicate a retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access comfy_get_output_images gives an agent:

POLICY

How to control comfy_get_output_images

PolicyLayer is an MCP gateway — it sits between your AI agents and ComfyUI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for comfy_get_output_images:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "comfy_get_output_images": {}
  }
}

comfy_get_output_images is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ComfyUI MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ComfyUI MCP Server tools

Destructive comfy_clear_queue Clear all pending items from the queue (does not affect currently running generation). Req Destructive comfy_delete_workflow Delete a saved workflow from the MCP library. Requires confirmation for safety. Execute comfy_cancel_generation Cancel a specific generation or interrupt the currently executing generation. Can optional Execute comfy_wait_for_completion Block until a generation completes or fails. Returns final outputs with image paths. Usefu Execute comfy_generate_simple Quick image generation using pre-configured workflow templates (flux_txt2img, sd15_txt2img Execute comfy_submit_workflow Submit a complete workflow JSON to ComfyUI for execution. Supports parameter overrides for Write comfy_save_workflow Save a workflow JSON to the MCP library for later reuse. Includes metadata like descriptio Write comfy_upload_image Upload an image to ComfyUI\

All 14 ComfyUI MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about comfy_get_output_images

What does the comfy_get_output_images tool do? +

List recent output images from ComfyUI\. It is categorised as a Read tool in the ComfyUI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on comfy_get_output_images? +

Register the ComfyUI MCP Server MCP server in PolicyLayer and add a rule for comfy_get_output_images: 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 ComfyUI MCP Server. Nothing to install.

What risk level is comfy_get_output_images? +

comfy_get_output_images is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit comfy_get_output_images? +

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

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

comfy_get_output_images is provided by the ComfyUI MCP Server MCP server (nikolaibibo/claude-comfyui-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ComfyUI MCP Server tool call.

Start from ComfyUI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →