AI agents call shodan-list-facets to retrieve information from Shodan MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Facets in search contexts typically enumerate aggregation dimensions or filter categories available in a database—a read-only operation with no side effects. Consistent with the server's passive reconnaissance focus and the pattern of sibling tools that retrieve data without modification or execution.
From the tool's definition Tool name 'shodan-list-facets' indicates a query/list operation. Server description emphasizes 'passive reconnaissance' and 'database of internet-connected devices'.
Documented attack patterns abuse exactly the kind of access shodan-list-facets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Shodan MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for shodan-list-facets:
{
"version": "1",
"default": "deny",
"tools": {
"shodan-list-facets": {}
}
}shodan-list-facets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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shodan-list-facets. It is categorised as a Read tool in the Shodan MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Shodan MCP Server MCP server in PolicyLayer and add a rule for shodan-list-facets: 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 Shodan MCP Server. Nothing to install.
shodan-list-facets 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 shodan-list-facets 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 shodan-list-facets. 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.
shodan-list-facets is provided by the Shodan MCP Server MCP server (vorota-ai/shodan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Shodan MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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20 Shodan MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.