AI agents call get_oa_citation_fields to retrieve information from USPTO Patent Citation MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to retrieve available fields for office action (OA) citations—a metadata query with no side effects. The 'get_' prefix and absence of any mutating language indicate a Read classification. Confidence is slightly reduced due to the empty description, but the naming pattern and server context provide strong signals.
From the tool's definition Tool name 'get_oa_citation_fields' follows a 'get_*' pattern consistent with Read operations (data retrieval).
Documented attack patterns abuse exactly the kind of access get_oa_citation_fields gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and USPTO Patent Citation MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_oa_citation_fields:
{
"version": "1",
"default": "deny",
"tools": {
"get_oa_citation_fields": {}
}
}get_oa_citation_fields is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_oa_citation_fields. It is categorised as a Read tool in the USPTO Patent Citation MCP Server MCP Server, which means it retrieves data without modifying state.
Register the USPTO Patent Citation MCP Server MCP server in PolicyLayer and add a rule for get_oa_citation_fields: 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 USPTO Patent Citation MCP Server. Nothing to install.
get_oa_citation_fields 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 get_oa_citation_fields 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 get_oa_citation_fields. 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.
get_oa_citation_fields is provided by the USPTO Patent Citation MCP Server MCP server (john-walkoe/uspto_enriched_citation_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from USPTO Patent Citation MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
10 USPTO Patent Citation MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.