nodebench.expand_subject

Expand a single person, company, event, topic, repo, or document into canonical entity resolution, related entities, recommended angles, and reusable resource URIs.

SERVERNodebench SOURCEnodebench-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-homenshum-nodebench/nodebench.expand-subject.md

WHAT IT DOES

What nodebench.expand_subject does on Nodebench

AI agents call nodebench.expand_subject 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.

RISK

Why nodebench.expand_subject is rated Low

This tool retrieves and resolves information about entities (people, companies, events, topics, repos, documents) without side effects. It returns structured data (canonical forms, related entities, recommendations, URIs) but does not create, modify, delete, or execute operations.

From the tool's definition The tool description states it 'Expand[s]...into canonical entity resolution, related entities, recommended angles, and reusable resource URIs' — all query/retrieval operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs nodebench.expand_subject 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 nodebench.expand_subject, this is the rule to start with:

nodebench.expand_subject Allowed

nodebench.expand_subject is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "nodebench.expand_subject": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Nodebench, apply this rule, and every nodebench.expand_subject call is checked against it from then on.

FAQ

Questions about nodebench.expand_subject

What does the nodebench.expand_subject tool do? +

Expand a single person, company, event, topic, repo, or document into canonical entity resolution, related entities, recommended angles, and reusable resource URIs. It is categorised as a Read tool in the Nodebench MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on nodebench.expand_subject? +

Register the Nodebench MCP server in PolicyLayer and add a rule for nodebench.expand_subject: 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.

What risk level is nodebench.expand_subject? +

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

Can I rate-limit nodebench.expand_subject? +

Yes. Add a rate_limit block to the nodebench.expand_subject 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 nodebench.expand_subject completely? +

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

nodebench.expand_subject 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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