find_usage_of_deprecated_code

THE RISK

Low Risk

Why find_usage_of_deprecated_code needs a policy

This tool queries a Neo4J knowledge graph to locate and analyze usage patterns of deprecated code elements. It performs read-only operations—searching the graph structure and computing impact metrics. The results inform migration decisions but do not themselves execute migrations, modify code, delete data, or trigger external processes.

From the tool's definition Tool name 'find_usage_of_deprecated_code' and description 'Find code that uses deprecated elements and assess migration impact' indicate querying/searching operations.

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

POLICY

How to control find_usage_of_deprecated_code

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_usage_of_deprecated_code:

policy.json

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

find_usage_of_deprecated_code 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.

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EXPLORE

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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 →
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FAQ

Questions about find_usage_of_deprecated_code

What does the find_usage_of_deprecated_code tool do? +

Find code that uses deprecated elements and assess migration impact. 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_usage_of_deprecated_code? +

Register the CodeRAG MCP server in PolicyLayer and add a rule for find_usage_of_deprecated_code: 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_usage_of_deprecated_code? +

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

Can I rate-limit find_usage_of_deprecated_code? +

Yes. Add a rate_limit block to the find_usage_of_deprecated_code 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_usage_of_deprecated_code completely? +

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

find_usage_of_deprecated_code 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.

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