AI agents invoke ad_coerce_printerbug to trigger actions in pentestMCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
The PrinterBug/SpoolSample technique coerces Windows hosts (often Domain Controllers) into authenticating to an attacker-controlled machine via the MS-RPRN protocol, enabling credential capture or relay attacks.
From the tool's definition Tool name 'ad_coerce_printerbug' on a penetration testing server alongside tools like 'ad_coerce_petitpotam', 'ad_dcsync', and 'ad_relay_setup'.
Documented attack patterns abuse exactly the kind of access ad_coerce_printerbug gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and pentestMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for ad_coerce_printerbug:
{
"version": "1",
"default": "deny",
"tools": {
"ad_coerce_printerbug": {
"limits": [
{
"counter": "ad_coerce_printerbug_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}ad_coerce_printerbug 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.
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ad_coerce_printerbug. It is categorised as a Execute tool in the pentestMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the pentest MCP server in PolicyLayer and add a rule for ad_coerce_printerbug: 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 pentestMCP. Nothing to install.
ad_coerce_printerbug is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the ad_coerce_printerbug 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.
Set action: deny in the PolicyLayer policy for ad_coerce_printerbug. 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.
ad_coerce_printerbug is provided by the pentest MCP server (ramkansal/pentestmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 36 pentestMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
36 pentestMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.