AI agents call list_query_templates 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 or lists available query templates—a read-only operation with no side effects. It provides information about what queries can be executed but does not execute them, modify data, or trigger external operations. The blast radius of misuse is minimal; an AI agent obtaining this list cannot harm data or systems directly.
From the tool's definition Tool name 'list_query_templates' and description '利用可能なクエリテンプレート一覧を取得' (retrieve list of available query templates) indicate a retrieval operation that returns metadata about available templates without modifying any data.
Documented attack patterns abuse exactly the kind of access list_query_templates 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 list_query_templates:
{
"version": "1",
"default": "deny",
"tools": {
"list_query_templates": {}
}
}list_query_templates is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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利用可能なクエリテンプレート一覧を取得. 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 list_query_templates: 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.
list_query_templates 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 list_query_templates 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 list_query_templates. 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.
list_query_templates 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.