courtlistener_lookup_citation

WHAT IT DOES

What courtlistener_lookup_citation does on CourtListener Citation Validation MCP Server

AI agents call courtlistener_lookup_citation to retrieve information from CourtListener Citation Validation MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why courtlistener_lookup_citation needs a policy

This tool retrieves citation information from a legal database to support validation workflows. It performs a read-only lookup with no state modification, deletion, execution of code, or financial impact. The operation is bounded to database queries and has minimal blast radius if misused by an AI agent (worst case: unnecessary API consumption).

From the tool's definition Tool name 'courtlistener_lookup_citation' combined with server context indicates a lookup/retrieval operation against the CourtListener legal citation database.

Documented attack patterns abuse exactly the kind of access courtlistener_lookup_citation gives an agent:

POLICY

How to control courtlistener_lookup_citation

PolicyLayer is an MCP gateway — it sits between your AI agents and CourtListener Citation Validation MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for courtlistener_lookup_citation:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "courtlistener_lookup_citation": {}
  }
}

courtlistener_lookup_citation is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register CourtListener Citation Validation MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More CourtListener Citation Validation MCP Server tools

Read courtlistener_citations_get_guidance courtlistener_citations_get_guidance Read courtlistener_extract_citations courtlistener_extract_citations Read courtlistener_get_cluster courtlistener_get_cluster Read courtlistener_search_cases courtlistener_search_cases Read courtlistener_search_clusters courtlistener_search_clusters Read courtlistener_validate_citations courtlistener_validate_citations

All 7 CourtListener Citation Validation MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about courtlistener_lookup_citation

What does the courtlistener_lookup_citation tool do? +

courtlistener_lookup_citation. It is categorised as a Read tool in the CourtListener Citation Validation MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on courtlistener_lookup_citation? +

Register the CourtListener Citation Validation MCP Server MCP server in PolicyLayer and add a rule for courtlistener_lookup_citation: 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 CourtListener Citation Validation MCP Server. Nothing to install.

What risk level is courtlistener_lookup_citation? +

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

Can I rate-limit courtlistener_lookup_citation? +

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

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

courtlistener_lookup_citation is provided by the CourtListener Citation Validation MCP Server MCP server (john-walkoe/courtlistener_citations_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CourtListener Citation Validation MCP Server tool call.

Start from CourtListener Citation Validation 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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7 CourtListener Citation Validation MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.