verify_domain · UseGrant MCP Server MCP: Risk & Policy

WHAT IT DOES

What verify_domain does on UseGrant MCP Server

AI agents invoke verify_domain to trigger actions in UseGrant MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why verify_domain needs a policy

Domain verification is an external operation that changes the trust/validation state of a domain record. It's not a simple read, nor does it create/modify data in the typical sense, but it triggers a verification process (likely an external check and state change). It falls under Execute as it performs an action with side effects (marking domain as verified) rather than destructive or financial operations.

From the tool's definition 'Verify a domain for a provider' — triggers an external verification operation that changes the domain's status/state

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

verify_domain Rate-limited

verify_domain stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "verify_domain": {
      "limits": [
        {
          "counter": "verify_domain_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches UseGrant MCP Server, so you can run agents against it safely.

FAQ

Questions about verify_domain

What does the verify_domain tool do? +

Verify a domain for a provider. It is categorised as a Execute tool in the UseGrant MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on verify_domain? +

Register the UseGrant MCP Server MCP server in PolicyLayer and add a rule for verify_domain: 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 UseGrant MCP Server. Nothing to install.

What risk level is verify_domain? +

verify_domain is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit verify_domain? +

Yes. Add a rate_limit block to the verify_domain 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.

How do I block verify_domain completely? +

Set action: deny in the PolicyLayer policy for verify_domain. 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.

What MCP server provides verify_domain? +

verify_domain is provided by the UseGrant MCP Server MCP server (usegranthq/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.