legal_fetch_patent_citations

SERVERDataNexus MCP SOURCEdev-7bd0/mcp-server

Low RISK CLASS

Category Read

Parameters 20 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-7bd0-mcp-server/legal-fetch-patent-citations.md

WHAT IT DOES

What legal_fetch_patent_citations does on DataNexus MCP

AI agents call legal_fetch_patent_citations to retrieve information from DataNexus MCP 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
`jurisdiction`	string	—	Patent office code: EP, US, WO. Default EP. Optional.
`patent_number`	string	—	Patent number e.g. EP3456789 or US10123456. Required.

Parameters from the server's own tool schema.

RISK

Why legal_fetch_patent_citations is rated Low

This tool performs passive data retrieval of patent citation metadata from public patent databases. It retrieves existing information about patent relationships without creating, modifying, deleting, or executing any operations. The explicit "read-only" and "idempotent" designations confirm no side effects are possible.

From the tool's definition Tool description explicitly states: "Read-only. No side effects. Idempotent." Functionality is to "Fetch forward and backward citation chains for a specific patent" and "Returns citing patents (forward patents) and cited patents (backward citations) with…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs legal_fetch_patent_citations safely

PolicyLayer is an MCP gateway: it sits between your AI agents and DataNexus MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For legal_fetch_patent_citations, this is the rule to start with:

legal_fetch_patent_citations Allowed

legal_fetch_patent_citations is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect DataNexus MCP, apply this rule, and every legal_fetch_patent_citations call is checked against it from then on.

FAQ

Questions about legal_fetch_patent_citations

What does the legal_fetch_patent_citations tool do? +

Fetch forward and backward citation chains for a specific patent. Read-only. No side effects. Idempotent. patent_number: Patent number in EPODOC format e.g. EP1000000 for European, CN120586032 for Chinese, JP2020123456 for Japanese, WO2020123456 for PCT, US10000000 for US. Required. jurisdiction: Optional hint — one of EP, US, WO, CN, JP, KR, etc. Default EP. The tool normalises the patent number automatically; passing CN120586032 with jurisdiction EP is valid. Returns citing patents (forward citations) and cited patents (backward citations) with filing dates and titles. Use this when building a prior art citation chain for a specific patent you already have. Use legal_search_patents_by_keyword instead when you need to find patents by topic not by citation. Verified source: EPO OPS. 24-hour cache. If this tool's response does not serve the user's need, call report_feedback with feedback_type="agent_gap", tool_id="legal_fetch_patent_citations", intended_query="{what the user needed}", gap_description="{what was missing or wrong in the result}". It is categorised as a Read tool in the DataNexus MCP MCP Server, which means it retrieves data without modifying state.

What parameters does legal_fetch_patent_citations accept? +

legal_fetch_patent_citations accepts 2 parameters: jurisdiction, patent_number. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on legal_fetch_patent_citations? +

Register the DataNexus MCP server in PolicyLayer and add a rule for legal_fetch_patent_citations: 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 DataNexus MCP. Nothing to install.

What risk level is legal_fetch_patent_citations? +

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

Can I rate-limit legal_fetch_patent_citations? +

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

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

legal_fetch_patent_citations is provided by the DataNexus MCP server (dev-7bd0/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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