Look up a certification by its cert number.
AI agents call vhc_verify_cert to retrieve information from Verified Human 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 certification information from a registry without creating, modifying, deleting, or executing any side effects. It is a straightforward lookup query operation, making it a Read category tool with low severity since misuse would only expose data already in the registry.
From the tool's definition Tool description states 'Look up a certification by its cert number' — a query operation with no modification capability. The server enables 'querying the Verified Human Cert registry,' confirming read-only intent.
Attacks that exploit this kind of access
Look up a certification by its cert number. It is categorised as a Read tool in the Verified Human MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Verified Human MCP Server MCP server in PolicyLayer and add a rule for vhc_verify_cert: 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 Verified Human MCP Server. Nothing to install.
vhc_verify_cert 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 vhc_verify_cert 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 vhc_verify_cert. 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.
vhc_verify_cert is provided by the Verified Human MCP Server MCP server (verifiedhumancert/verified-human-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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