AI agents call query_knowledge_base to retrieve information from MCP-RAGAnything without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name and context of a RAG (Retrieval-Augmented Generation) service indicate this retrieves or queries data from a knowledge base. RAG systems are designed to fetch relevant information to augment LLM responses. No indication of write, delete, execute, or financial operations.
From the tool's definition Tool name 'query_knowledge_base' indicates a search/retrieval operation against a stored knowledge base. Sibling tools include 'query_knowledge_base_multimodal', 'classical_query', 'list_bricks_documents', 'read_file', and 'read_bricks_document'—all read-only…
Documented attack patterns abuse exactly the kind of access query_knowledge_base gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP-RAGAnything, and nothing reaches the server without passing your rules. This is the rule we recommend for query_knowledge_base:
{
"version": "1",
"default": "deny",
"tools": {
"query_knowledge_base": {}
}
}query_knowledge_base is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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query_knowledge_base. It is categorised as a Read tool in the MCP-RAGAnything MCP Server, which means it retrieves data without modifying state.
Register the MCP-RAGAnything MCP server in PolicyLayer and add a rule for query_knowledge_base: 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 MCP-RAGAnything. Nothing to install.
query_knowledge_base 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 query_knowledge_base 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 query_knowledge_base. 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.
query_knowledge_base is provided by the MCP-RAGAnything MCP server (soludevtech/mcp-raganything). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP-RAGAnything, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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9 MCP-RAGAnything tools catalogued and risk-classified — across an index of 43,000+ MCP servers.