find_usage_examples

THE RISK

Low Risk

Why find_usage_examples needs a policy

This tool retrieves usage examples from existing test jars in the local Maven repository. It performs a search/query operation with no side effects, no code execution, and no data modification. The action is purely informational, making it a Read category tool with low severity risk.

From the tool's definition Tool name 'find_usage_examples' and description 'Find usage examples of classes/methods in test jars' indicate a retrieval operation that searches for and returns examples without modifying or executing code.

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

POLICY

How to control find_usage_examples

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

policy.json

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

find_usage_examples 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 Maven Decoder MCP Server — 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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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_examples

What does the find_usage_examples tool do? +

Find usage examples of classes/methods in test jars. It is categorised as a Read tool in the Maven Decoder MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_usage_examples? +

Register the Maven Decoder MCP Server MCP server in PolicyLayer and add a rule for find_usage_examples: 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 Maven Decoder MCP Server. Nothing to install.

What risk level is find_usage_examples? +

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

Can I rate-limit find_usage_examples? +

Yes. Add a rate_limit block to the find_usage_examples 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_examples completely? +

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

find_usage_examples is provided by the Maven Decoder MCP Server MCP server (salitaba/maven-decoder-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Maven Decoder MCP Server tool call.

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

CHECK YOUR STACK →