list_printers

THE RISK

Low Risk

Why list_printers needs a policy

This tool simply enumerates and retrieves printer metadata (names, states, availability status). It has no side effects, does not modify system state, does not execute code or commands, and does not involve financial or destructive operations. It is a straightforward information retrieval operation, making it a Read category risk with low severity.

From the tool's definition Tool name 'list_printers' and description 'List all available printers on the system with their status. Returns printer names, states' indicate a read-only query operation that retrieves printer information without modifying or executing actions.

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

POLICY

How to control list_printers

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

policy.json

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

list_printers 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 MCP Printer 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 MCP Printer Server tools

Destructive cancel_print_job Cancel a specific print job by job ID or cancel all jobs for a printer. Execute print_file Print a file to a specified printer. Supports PDF, text, and other common formats. Can spe Write set_default_printer Set a printer as the default printer Read get_config Get the current MCP Printer configuration settings. Returns environment variables and thei Read get_default_printer Get the name of the default printer Read get_page_meta Get page count and physical sheet information for a file before printing. Pre-renders the Read get_print_queue Check the print queue for a specific printer or all printers. Shows pending and active pri

All 8 MCP Printer 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 list_printers

What does the list_printers tool do? +

List all available printers on the system with their status. Returns printer names, states, and whether they. It is categorised as a Read tool in the MCP Printer Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_printers? +

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

What risk level is list_printers? +

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

Can I rate-limit list_printers? +

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

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

list_printers is provided by the MCP Printer Server MCP server (steveclarke/mcp-printer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Printer Server tool call.

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

CHECK YOUR STACK →