AI agents call url_list_for_domain to retrieve information from SeldomMaster without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data (URLs for a given domain) without side effects. It is a read-only intelligence gathering operation consistent with the threat intelligence purpose of the server. Even in a cybersecurity context, listing URLs is passive reconnaissance that does not modify, execute, or destroy data. The blast radius of misuse is limited to information disclosure.
From the tool's definition Tool name 'url_list_for_domain' and description 'url_list_for_domain' indicate a retrieval operation that queries and lists URLs associated with a domain. No modification, deletion, or execution of external operations is implied.
Documented attack patterns abuse exactly the kind of access url_list_for_domain gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SeldomMaster, and nothing reaches the server without passing your rules. This is the rule we recommend for url_list_for_domain:
{
"version": "1",
"default": "deny",
"tools": {
"url_list_for_domain": {}
}
}url_list_for_domain is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Name: url_list_for_domain. It is categorised as a Read tool in the SeldomMaster MCP Server, which means it retrieves data without modifying state.
Register the SeldomMaster MCP server in PolicyLayer and add a rule for url_list_for_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 SeldomMaster. Nothing to install.
url_list_for_domain 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 url_list_for_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.
Set action: deny in the PolicyLayer policy for url_list_for_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.
url_list_for_domain is provided by the SeldomMaster MCP server (paralax/seldommonster). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SeldomMaster, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
52 SeldomMaster tools catalogued and risk-classified — across an index of 43,000+ MCP servers.