print_file

THE RISK

High Risk

Why print_file needs a policy

Printing a file triggers an external physical operation (sending a job to a printer via CUPS). It is not purely a data write within a system, nor is it destructive or financial. It executes an external action whose effects depend on the arguments (file, printer, copies, options). Misuse could result in unwanted physical printouts, waste of resources, or exposure of sensitive documents, giving it medium severity.

From the tool's definition "Print a file to a specified printer" and "triggers external operations" via CUPS printing system

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

POLICY

How to control print_file

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 print_file:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "print_file": {
      "limits": [
        {
          "counter": "print_file_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

print_file stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. 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.

RATE-LIMIT 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. 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 Read list_printers List all available printers on the system with their status. Returns printer names, states

All 8 MCP Printer Server tools →

Execute tools on other servers

Android Forensics ADB MCP Server adb_shell_command EMBA-MCP run_emba_scan Frida Game Hacking MCP remove_breakpoint Procmon request_elevation

Go deeper

High-risk tools in MCP Printer Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about print_file

What does the print_file tool do? +

Print a file to a specified printer. Supports PDF, text, and other common formats. Can specify number of copies and print options. It is categorised as a Execute tool in the MCP Printer Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on print_file? +

Register the MCP Printer Server MCP server in PolicyLayer and add a rule for print_file: 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 print_file? +

print_file is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit print_file? +

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

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

print_file 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 →