attach_image

THE RISK

Low Risk

Why attach_image needs a policy

The tool reads/loads an image file and presents it for analysis. It does not modify, delete, or execute anything — it retrieves file content for vision processing. Severity is low as it only reads existing image files.

From the tool's definition 'Attach an image file for AI vision analysis. The image will be presented'

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

POLICY

How to control attach_image

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

policy.json

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

attach_image 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 Vulcan File Ops — 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 Vulcan File Ops tools

Destructive delete_files Delete single or multiple files and directories securely. Write file_operations Perform bulk file operations (move, copy, rename) on single or multiple files and director Write edit_file Apply precise modifications to text and code files with intelligent matching.\n\n Write make_directory Create single or multiple directories with recursive parent creation Write move_file Relocate or rename files and directories in a single atomic operation. Write register_directory Register a directory for access. This allows the AI to dynamically gain access Write write_multiple_files Write multiple files concurrently. Supports text, PDF, and DOCX with HTML formatting. Read get_file_info Extract comprehensive metadata and statistics for files or directories.

All 15 Vulcan File Ops tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

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 attach_image

What does the attach_image tool do? +

Attach an image file for AI vision analysis. The image will be presented. It is categorised as a Read tool in the Vulcan File Ops MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on attach_image? +

Register the Vulcan File Ops MCP server in PolicyLayer and add a rule for attach_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 Vulcan File Ops. Nothing to install.

What risk level is attach_image? +

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

Can I rate-limit attach_image? +

Yes. Add a rate_limit block to the attach_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 attach_image completely? +

Set action: deny in the PolicyLayer policy for attach_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 attach_image? +

attach_image is provided by the Vulcan File Ops MCP server (n0zer0d4y/vulcan-file-ops). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Vulcan File Ops tool call.

Start from Vulcan File Ops, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →