Inspect the TLS certificate served by a host: issuer, subject, validity window, days-until-expiry, SANs, serial and SHA-256 fingerprint. Flags expired or soon-to-expire certificates. Args: - domain (string): host to connect to. - port (number): TLS port (default 443). - response_format (
AI agents call ssl_certificate to retrieve information from Domain Security without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a certificate inspection/audit tool that queries publicly available TLS certificate information. It performs network reconnaissance to retrieve metadata but does not execute code, modify data, create/delete resources, or move money. The most severe applicable category is Read.
From the tool's definition Tool retrieves and inspects TLS certificate metadata (issuer, subject, validity window, SANs, serial, SHA-256 fingerprint) from a host.
Attacks that exploit this kind of access
Inspect the TLS certificate served by a host: issuer, subject, validity window, days-until-expiry, SANs, serial and SHA-256 fingerprint. Flags expired or soon-to-expire certificates. Args: - domain (string): host to connect to. - port (number): TLS port (default 443). - response_format (. It is categorised as a Read tool in the Domain Security MCP Server, which means it retrieves data without modifying state.
Register the Domain Security MCP server in PolicyLayer and add a rule for ssl_certificate: 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 Domain Security. Nothing to install.
ssl_certificate 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 ssl_certificate 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 ssl_certificate. 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.
ssl_certificate is provided by the Domain Security MCP server (ortamarco/domain-security-mcp-server). 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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