getKnowledgeGraph
Get a knowledge graph by source document, including nodes, edges, and claims.
This record as markdown: /tools/io-github-homenshum-nodebench/getknowledgegraph.md
What getKnowledgeGraph does on Nodebench
AI agents call getKnowledgeGraph to retrieve information from Nodebench without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why getKnowledgeGraph is rated Low
The verb 'Get' and the description's focus on retrieving and returning a knowledge graph structure indicates a pure read operation. No data is created, modified, deleted, or executed. The blast radius of misuse is minimal — an agent could retrieve information it shouldn't access, but cannot alter systems or trigger external operations.
From the tool's definition Tool description states 'Get a knowledge graph' — a retrieval operation with no modification or execution. Returns data structures (nodes, edges, claims) without side effects.
Attacks that exploit this kind of access
The rule that runs getKnowledgeGraph safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Nodebench, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For getKnowledgeGraph, this is the rule to start with:
getKnowledgeGraph is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Nodebench, apply this rule, and every getKnowledgeGraph call is checked against it from then on.
Questions about getKnowledgeGraph
Get a knowledge graph by source document, including nodes, edges, and claims. It is categorised as a Read tool in the Nodebench MCP Server, which means it retrieves data without modifying state.
Register the Nodebench MCP server in PolicyLayer and add a rule for getKnowledgeGraph: 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 Nodebench. Nothing to install.
getKnowledgeGraph 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 getKnowledgeGraph 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 getKnowledgeGraph. 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.
getKnowledgeGraph is provided by the Nodebench MCP server (nodebench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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