AI agents call get_important_features to retrieve information from JVLink MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and provides analytical insights about important features in Japanese horse racing data. It has no capability to modify data, execute arbitrary code, delete records, or move money. The operation is purely informational (get/retrieve pattern), consistent with Read category.
From the tool's definition Tool name 'get_important_features' and description '競馬予測で重要な特徴量の知見を提供' (provides insights on important features for horse racing prediction) indicate retrieval and analysis of existing data without modification or side effects.
Documented attack patterns abuse exactly the kind of access get_important_features gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and JVLink MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_important_features:
{
"version": "1",
"default": "deny",
"tools": {
"get_important_features": {}
}
}get_important_features is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
競馬予測で重要な特徴量の知見を提供. It is categorised as a Read tool in the JVLink MCP Server MCP Server, which means it retrieves data without modifying state.
Register the JVLink MCP Server MCP server in PolicyLayer and add a rule for get_important_features: 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 JVLink MCP Server. Nothing to install.
get_important_features 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_important_features 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_important_features. 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_important_features is provided by the JVLink MCP Server MCP server (miyamamoto/jvlink-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from JVLink MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
25 JVLink MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.