Check if a domain is available for registration
AI agents call check_domain_availability to retrieve information from Domain-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only lookup to determine domain availability status. It retrieves information from domain registries but does not create, modify, delete, or execute any operations. The action is purely informational with no side effects, placing it squarely in the Read category. Severity is low as misuse would only result in gathering public information about domain availability.
From the tool's definition Tool name 'check_domain_availability' and description 'Check if a domain is available for registration' indicate a query operation that retrieves availability status without modifying any data or triggering side effects.
Documented attack patterns abuse exactly the kind of access check_domain_availability gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Domain-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for check_domain_availability:
{
"version": "1",
"default": "deny",
"tools": {
"check_domain_availability": {}
}
}check_domain_availability is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check if a domain is available for registration. It is categorised as a Read tool in the Domain-MCP MCP Server, which means it retrieves data without modifying state.
Register the Domain- MCP server in PolicyLayer and add a rule for check_domain_availability: 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-MCP. Nothing to install.
check_domain_availability 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 check_domain_availability 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 check_domain_availability. 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.
check_domain_availability is provided by the Domain- MCP server (rinadelph/domain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Domain-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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8 Domain-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.