AI agents call validate_sql_query 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 performs validation/analysis of SQL queries without executing them or modifying data. It retrieves or analyzes information about query safety. However, confidence is moderate (0.7) because: (1) the description is minimal and in Japanese only; (2) validation tools can sometimes expose schema information or reveal query patterns; (3) the tool's actual output and what information it returns about validation…
From the tool's definition Tool name is 'validate_sql_query' with description 'SQLクエリの安全性を検証' (validates SQL query safety). The function validates rather than executes queries, making it a read operation.
Documented attack patterns abuse exactly the kind of access validate_sql_query 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 validate_sql_query:
{
"version": "1",
"default": "deny",
"tools": {
"validate_sql_query": {}
}
}validate_sql_query is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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SQLクエリの安全性を検証. 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 validate_sql_query: 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.
validate_sql_query 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 validate_sql_query 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 validate_sql_query. 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.
validate_sql_query 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.