Semantic search within a single document using vector embeddings + reranking. Returns ranked chunks with
AI agents call doc_query to retrieve information from MinerU Document Explorer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
doc_query searches and retrieves document content without modifying data, executing code, or triggering external side effects. It is a read-only query tool. Severity is low because misuse would only expose data already accessible to the agent, not enable destructive or financial harm.
From the tool's definition Tool performs 'semantic search within a single document using vector embeddings + reranking' and 'returns ranked chunks' — pure information retrieval with no mutation or execution of external operations.
Documented attack patterns abuse exactly the kind of access doc_query gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MinerU Document Explorer, and nothing reaches the server without passing your rules. This is the rule we recommend for doc_query:
{
"version": "1",
"default": "deny",
"tools": {
"doc_query": {}
}
}doc_query is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Semantic search within a single document using vector embeddings + reranking. Returns ranked chunks with. It is categorised as a Read tool in the MinerU Document Explorer MCP Server, which means it retrieves data without modifying state.
Register the MinerU Document Explorer MCP server in PolicyLayer and add a rule for doc_query: 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 MinerU Document Explorer. Nothing to install.
doc_query 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 doc_query 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 doc_query. 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.
doc_query is provided by the MinerU Document Explorer MCP server (opendatalab/mineru-document-explorer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 MinerU Document Explorer tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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15 MinerU Document Explorer tools catalogued and risk-classified — across an index of 42,500+ MCP servers.