run_exam

THE RISK

High Risk

Why run_exam needs a policy

This tool executes an exam process (a form of automated testing/validation) against an MCP server using runtime and configuration parameters. While the exact side effects depend on what the exam does, the fundamental action is triggering code execution on a target server. This fits the Execute category—an action that runs code or triggers external operations whose effects are argument-dependent.

From the tool's definition Tool name is 'run_exam' and description states 'Execute a Proctor exam against an MCP server' and 'runs the specified exam using the provided runtime and MCP configuration'. The verb 'Execute' and 'runs' indicate code/process execution.

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

POLICY

How to control run_exam

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

policy.json

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

run_exam 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 Playwright Stealth — 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 Playwright Stealth tools

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All 68 Playwright Stealth 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 Playwright Stealth → 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 run_exam

What does the run_exam tool do? +

Execute a Proctor exam against an MCP server. Runs the specified exam using the provided runtime and MCP configuration. The exam tests the MCP server. It is categorised as a Execute tool in the Playwright Stealth MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_exam? +

Register the Playwright Stealth MCP server in PolicyLayer and add a rule for run_exam: 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 Playwright Stealth. Nothing to install.

What risk level is run_exam? +

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

Can I rate-limit run_exam? +

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

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

run_exam is provided by the Playwright Stealth MCP server (pulsemcp/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Playwright Stealth tool call.

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

CHECK YOUR STACK →