db_batch_execute · Onpe MCP: Risk & Policy

WHAT IT DOES

What db_batch_execute does on Onpe

AI agents invoke db_batch_execute to trigger actions in Onpe. 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 db_batch_execute needs a policy

The tool executes batches of queries rather than just retrieving data passively. Even in a read-only context, batch execution can amplify impact (e.g., resource exhaustion, data exfiltration at scale). The 'controlado' qualifier reduces severity but the Execute category is appropriate given it runs operations rather than simply fetching.

From the tool's definition "Ejecuta un batch de consultas db_query" — executes a batch of queries; despite claiming "read-only controlado", the tool actively executes multiple operations in batch mode, which elevates risk beyond a simple read.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

db_batch_execute Rate-limited

db_batch_execute 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": {
    "db_batch_execute": {
      "limits": [
        {
          "counter": "db_batch_execute_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 Onpe, so you can run agents against it safely.

FAQ

Questions about db_batch_execute

What does the db_batch_execute tool do? +

Ejecuta un batch de consultas db_query en modo read-only controlado. It is categorised as a Execute tool in the Onpe MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on db_batch_execute? +

Register the Onpe MCP server in PolicyLayer and add a rule for db_batch_execute: 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 Onpe. Nothing to install.

What risk level is db_batch_execute? +

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

Can I rate-limit db_batch_execute? +

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

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

db_batch_execute is provided by the Onpe MCP server (oscarzamora/onpe-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.