Detect information leakage in HTTP response headers. Checks for exposed server versions, debug headers, X-Powered-By, CORS misconfigurations, and error responses.
AI agents call vuln_headers to retrieve information from Mcp Services without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes HTTP response headers to identify potential security issues (exposed versions, debug headers, CORS misconfigurations). It is read-only: it queries existing HTTP responses and reports findings without modifying data, executing code, or causing side effects.
From the tool's definition Tool 'Detect information leakage in HTTP response headers' performs inspection and analysis of headers without modifying or executing anything. It 'checks for' exposed data—a passive analysis operation.
Attacks that exploit this kind of access
Detect information leakage in HTTP response headers. Checks for exposed server versions, debug headers, X-Powered-By, CORS misconfigurations, and error responses. It is categorised as a Read tool in the Mcp Services MCP Server, which means it retrieves data without modifying state.
Register the Mcp Services MCP server in PolicyLayer and add a rule for vuln_headers: 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 Services. Nothing to install.
vuln_headers 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 vuln_headers 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 vuln_headers. 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.
vuln_headers is provided by the Mcp Services MCP server (san-npm/mcp-services). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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