Get full details for a specific case by its citation. Returns comprehensive case metadata, all known citation aliases, and citation treatment statistics showing how many times the case was followed, distinguished, overruled, approved, or referred. Use after resolve_citation or search_cases_by_cit...
Part of the Vaquill server.
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AI agents call lookup_case to retrieve information from Vaquill 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 lookup_case 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.
{
"version": "1",
"default": "deny",
"tools": {
"lookup_case": {}
}
}See the full Vaquill policy for all 15 tools.
These attack patterns abuse exactly the kind of access lookup_case gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Get full details for a specific case by its citation. Returns comprehensive case metadata, all known citation aliases, and citation treatment statistics showing how many times the case was followed, distinguished, overruled, approved, or referred. Use after resolve_citation or search_cases_by_citation for deep case analysis. Cost: 1 credit.. It is categorised as a Read tool in the Vaquill MCP Server, which means it retrieves data without modifying state.
Register the Vaquill MCP server in PolicyLayer and add a rule for lookup_case: 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 Vaquill. Nothing to install.
lookup_case 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 lookup_case 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 lookup_case. 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.
lookup_case is provided by the Vaquill MCP server (https://mcp.vaquill.ai/s/_). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Vaquill tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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