find_nodes_by_type

THE RISK

Low Risk

Why find_nodes_by_type needs a policy

This is a straightforward data retrieval tool that searches the codebase knowledge graph for nodes matching a specified type. It has no side effects, does not modify the graph, and does not execute code or commands. It is purely informational, making it a Read category tool with low severity.

From the tool's definition Tool name 'find_nodes_by_type' and description 'Find nodes by their type' indicate a query operation that retrieves nodes from the Neo4J knowledge graph without modifying, deleting, or executing external operations.

Documented attack patterns abuse exactly the kind of access find_nodes_by_type gives an agent:

POLICY

How to control find_nodes_by_type

PolicyLayer is an MCP gateway — it sits between your AI agents and CodeRAG, and nothing reaches the server without passing your rules. This is the rule we recommend for find_nodes_by_type:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_nodes_by_type": {}
  }
}

find_nodes_by_type is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register CodeRAG — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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All 38 CodeRAG tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_nodes_by_type

What does the find_nodes_by_type tool do? +

Find nodes by their type. It is categorised as a Read tool in the CodeRAG MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_nodes_by_type? +

Register the CodeRAG MCP server in PolicyLayer and add a rule for find_nodes_by_type: 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 CodeRAG. Nothing to install.

What risk level is find_nodes_by_type? +

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

Can I rate-limit find_nodes_by_type? +

Yes. Add a rate_limit block to the find_nodes_by_type 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 find_nodes_by_type completely? +

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

find_nodes_by_type is provided by the CodeRAG MCP server (jonnoc/coderag). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CodeRAG tool call.

Start from CodeRAG, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →