circl_cve_lookup
Look up a CVE vulnerability by ID from CIRCL (cve.circl.lu).
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/circl-cve-lookup.md
What circl_cve_lookup does on UnClick
AI agents call circl_cve_lookup to retrieve information from UnClick without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
cve_id | string | Yes | CVE ID (e.g. CVE-2024-1234). |
Parameters from the server's own tool schema.
Why circl_cve_lookup is rated Low
The tool performs a read-only lookup of CVE data from a public database (CIRCL). It retrieves vulnerability information without creating, modifying, deleting, or executing code. The blast radius of misuse is minimal—an agent could spam requests or retrieve vulnerability details it shouldn't know, but cannot cause harm through the tool itself. This is a classic Read operation.
From the tool's definition Tool name and description: 'Look up a CVE vulnerability by ID' — this is a query/lookup operation that retrieves information about known CVE vulnerabilities with no modification of data or side effects.
Attacks that exploit this kind of access
The rule that runs circl_cve_lookup safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For circl_cve_lookup, this is the rule to start with:
circl_cve_lookup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every circl_cve_lookup call is checked against it from then on.
Questions about circl_cve_lookup
Look up a CVE vulnerability by ID from CIRCL (cve.circl.lu). It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
circl_cve_lookup accepts 1 parameter: cve_id. Required: cve_id. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for circl_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 UnClick. Nothing to install.
circl_cve_lookup 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 circl_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.
Set action: deny in the PolicyLayer policy for circl_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.
circl_cve_lookup is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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