query_knowledge_base_document

Query a CSV document from the knowledge base using natural language. IMPORTANT: This tool ONLY works with CSV documents. Use list_knowledge_base_documents with filters=

ServerRAD Security
CategoryRead

How to control query_knowledge_base_document ↓

WHAT IT DOES

What query_knowledge_base_document does on RAD Security

AI agents call query_knowledge_base_document to retrieve information from RAD Security 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 query_knowledge_base_document needs a policy

This tool retrieves and queries existing data from a knowledge base without creating, modifying, deleting, or executing operations. It is purely informational and poses minimal risk as a standalone tool—an agent cannot cause harm by querying documents. The severity is low because the worst-case scenario is exposure of information already stored in the knowledge base, which is already known to the system.

From the tool's definition Tool description states it 'Query[s] a CSV document from the knowledge base using natural language' and explicitly notes 'This tool ONLY works with CSV documents'.

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

POLICY

How to control query_knowledge_base_document

PolicyLayer is an MCP gateway — it sits between your AI agents and RAD Security, and nothing reaches the server without passing your rules. This is the rule we recommend for query_knowledge_base_document:

policy.json

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

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

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EXPLORE

Related tools and policies

More RAD Security tools

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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 query_knowledge_base_document

What does the query_knowledge_base_document tool do? +

Query a CSV document from the knowledge base using natural language. IMPORTANT: This tool ONLY works with CSV documents. Use list_knowledge_base_documents with filters=. It is categorised as a Read tool in the RAD Security MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on query_knowledge_base_document? +

Register the RAD Security MCP server in PolicyLayer and add a rule for query_knowledge_base_document: 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 RAD Security. Nothing to install.

What risk level is query_knowledge_base_document? +

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

Can I rate-limit query_knowledge_base_document? +

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

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

query_knowledge_base_document is provided by the RAD Security MCP server (rad-security/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RAD Security tool call.

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55 RAD Security tools catalogued and risk-classified — across an index of 43,000+ MCP servers.