Low Risk

cve_lookup

Query detailed vulnerability information from Shodan

Part of the Mcp Shodan server.

cve_lookup is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call cve_lookup to retrieve information from Mcp Shodan without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though cve_lookup only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "cve_lookup": {}
  }
}

See the full Mcp Shodan policy for all 7 tools.

Get this rule live on your own Mcp Shodan server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access cve_lookup gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so cve_lookup only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the cve_lookup tool do? +

Query detailed vulnerability information from Shodan. It is categorised as a Read tool in the Mcp Shodan MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on cve_lookup? +

Register the Mcp Shodan MCP server in PolicyLayer and add a rule for cve_lookup: 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 Mcp Shodan. Nothing to install.

What risk level is cve_lookup? +

cve_lookup is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit cve_lookup? +

Yes. Add a rate_limit block to the cve_lookup 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 cve_lookup completely? +

Set action: deny in the PolicyLayer policy for cve_lookup. 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 cve_lookup? +

cve_lookup is provided by the Mcp Shodan MCP server (@burtthecoder/mcp-shodan). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Shodan tool call.

Deterministic rules across all 7 Mcp Shodan tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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