Retrieve all environment variables from your Rails application running on Hatchbox via SSH. This tool connects to your server and reads environment variables directly from the running puma process, providing a complete view of your application
AI agents call getEnvVars to retrieve information from Playwright Stealth without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs data retrieval only (Read category). However, severity is high because environment variables typically contain sensitive information such as API keys, database credentials, encryption keys, and authentication tokens. An AI agent gaining access to these secrets could pivot to compromise connected systems, even though the tool itself does not execute commands or modify state.
From the tool's definition Tool description explicitly states 'Retrieve all environment variables' and 'reads environment variables directly' — these are read-only operations that query data without modifying or deleting it.
Documented attack patterns abuse exactly the kind of access getEnvVars gives an agent:
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 getEnvVars:
{
"version": "1",
"default": "deny",
"tools": {
"getEnvVars": {}
}
}getEnvVars is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve all environment variables from your Rails application running on Hatchbox via SSH. This tool connects to your server and reads environment variables directly from the running puma process, providing a complete view of your application. It is categorised as a Read tool in the Playwright Stealth MCP Server, which means it retrieves data without modifying state.
Register the Playwright Stealth MCP server in PolicyLayer and add a rule for getEnvVars: 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.
getEnvVars is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the getEnvVars 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 getEnvVars. 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.
getEnvVars 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.
Start from Playwright Stealth, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
68 Playwright Stealth tools catalogued and risk-classified — across an index of 43,000+ MCP servers.