AI agents call get_actor 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 queries threat intelligence data to retrieve information about threat actors—a read-only operation that retrieves or queries existing data without modifying, executing, or destroying anything. No security boundaries are crossed by mere lookup of publicly available threat intelligence metadata.
From the tool's definition Tool name 'get_actor' and context describing a 'cybersecurity threat intelligence' server integrating threat APIs (GreyNoise, Malpedia, OpenCTI). The verb 'get' indicates data retrieval with no side effects.
Documented attack patterns abuse exactly the kind of access get_actor 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 get_actor:
{
"version": "1",
"default": "deny",
"tools": {
"get_actor": {}
}
}get_actor is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Name: get_actor. 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 get_actor: 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.
get_actor 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 get_actor 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 get_actor. 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.
get_actor 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.
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52 SeldomMaster tools catalogued and risk-classified — across an index of 43,000+ MCP servers.