query_database_jsonl · OpenLink MCP Server for ODBC MCP

WHAT IT DOES

What query_database_jsonl does on OpenLink MCP Server for ODBC

AI agents invoke query_database_jsonl to trigger actions in OpenLink MCP Server for ODBC. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why query_database_jsonl needs a policy

The tool explicitly executes SQL queries, which can include not only SELECT statements but potentially DML/DDL depending on access controls. Arbitrary SQL execution carries high blast radius risk (data exfiltration, modification, or destruction if write permissions exist).

From the tool's definition "Execute a SQL query" — the tool runs arbitrary SQL against an ODBC-accessible database and returns results.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

query_database_jsonl Rate-limited

query_database_jsonl stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "query_database_jsonl": {
      "limits": [
        {
          "counter": "query_database_jsonl_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches OpenLink MCP Server for ODBC, so you can run agents against it safely.

FAQ

Questions about query_database_jsonl

What does the query_database_jsonl tool do? +

Execute a SQL query and return results in JSONL format. It is categorised as a Execute tool in the OpenLink MCP Server for ODBC MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on query_database_jsonl? +

Register the OpenLink MCP Server for ODBC MCP server in PolicyLayer and add a rule for query_database_jsonl: 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 OpenLink MCP Server for ODBC. Nothing to install.

What risk level is query_database_jsonl? +

query_database_jsonl is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit query_database_jsonl? +

Yes. Add a rate_limit block to the query_database_jsonl 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 query_database_jsonl completely? +

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

query_database_jsonl is provided by the OpenLink MCP Server for ODBC MCP server (pvsmark/pvs-odbc-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.