AI agents call get_firewall_config to retrieve information from Vercel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves firewall configuration settings from a Vercel project. It performs a data query operation with no side effects—it does not create, modify, delete, or execute any actions. The 'Retrieve' verb explicitly indicates a read-only operation.
From the tool's definition Tool name contains 'get_' and description says 'Retrieve the firewall configuration', which are indicative of a read operation that queries existing configuration data without modification.
Documented attack patterns abuse exactly the kind of access get_firewall_config gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Vercel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_firewall_config:
{
"version": "1",
"default": "deny",
"tools": {
"get_firewall_config": {}
}
}get_firewall_config is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve the firewall configuration. It is categorised as a Read tool in the Vercel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vercel MCP Server MCP server in PolicyLayer and add a rule for get_firewall_config: 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 Vercel MCP Server. Nothing to install.
get_firewall_config 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 get_firewall_config 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 get_firewall_config. 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.
get_firewall_config is provided by the Vercel MCP Server MCP server (quegenx/vercel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 154 Vercel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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154 Vercel MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.