AI agents call query_data to retrieve information from Lightrag without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data from a RAG system for analysis purposes without side effects. It does not create, modify, delete, or execute any operations. While it's part of a server with destructive capabilities (delete_document, delete_entity), this specific tool is limited to data retrieval, making it a Read category risk with low severity.
From the tool's definition Tool described as 'Advanced data retrieval endpoint for structured RAG analysis' with no mention of modification, deletion, or execution capabilities. The name 'query_data' and purpose of 'retrieval' indicate a read-only operation.
Attacks that exploit this kind of access
Advanced data retrieval endpoint for structured RAG analysis without LLM generation. It is categorised as a Read tool in the Lightrag MCP Server, which means it retrieves data without modifying state.
Register the Lightrag MCP server in PolicyLayer and add a rule for query_data: 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 Lightrag. Nothing to install.
query_data 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_data 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_data. 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_data is provided by the Lightrag MCP server (lightrag-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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