AI agents call get_java_version to retrieve information from Java Decompiler MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns Java version information from the system environment. It performs a read-only operation that retrieves data about the runtime environment with no side effects, state changes, or code execution capability. Misuse by an AI agent poses minimal risk—it can only expose version strings that may already be discoverable through other means.
From the tool's definition Tool name 'get_java_version' and description '获取当前系统的 Java 版本信息' (Get current system Java version information) indicates retrieval of system metadata without modification or execution of user code.
Documented attack patterns abuse exactly the kind of access get_java_version gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Java Decompiler MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_java_version:
{
"version": "1",
"default": "deny",
"tools": {
"get_java_version": {}
}
}get_java_version is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取当前系统的 Java 版本信息. It is categorised as a Read tool in the Java Decompiler MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Java Decompiler MCP Server MCP server in PolicyLayer and add a rule for get_java_version: 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 Java Decompiler MCP Server. Nothing to install.
get_java_version 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 get_java_version 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 get_java_version. 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.
get_java_version is provided by the Java Decompiler MCP Server MCP server (ruoji6/java-decompile-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Java Decompiler MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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6 Java Decompiler MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.