Retrieve knowledge graph for a specific label or all entities
AI agents call get_knowledge_graph to retrieve information from LightRAG MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries knowledge graph data without creating, modifying, or deleting anything. It has no side effects on the system state. The blast radius of misuse is minimal—worst case, an agent reads data it shouldn't, but no data is altered or operations triggered. This is a classic Read operation.
From the tool's definition Tool name 'get_knowledge_graph' and description 'Retrieve knowledge graph for a specific label or all entities' indicate data retrieval without modification. The verb 'Retrieve' confirms read-only operation.
Attacks that exploit this kind of access
Retrieve knowledge graph for a specific label or all entities. It is categorised as a Read tool in the LightRAG MCP Server MCP Server, which means it retrieves data without modifying state.
Register the LightRAG MCP Server MCP server in PolicyLayer and add a rule for get_knowledge_graph: 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 MCP Server. Nothing to install.
get_knowledge_graph 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 get_knowledge_graph 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 get_knowledge_graph. 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.
get_knowledge_graph is provided by the LightRAG MCP Server MCP server (lalitsuryan/lightragmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_knowledge_graph is one line of LightRAG MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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