cbs_query_dataset · Nl Opendata MCP: Risk & Policy

WHAT IT DOES

What cbs_query_dataset does on Nl Opendata

AI agents invoke cbs_query_dataset to trigger actions in Nl Opendata. 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 cbs_query_dataset needs a policy

The tool name contains 'query' which, combined with the server's mention of DuckDB and data analysis tools, suggests it executes queries (potentially arbitrary SQL via DuckDB) against datasets. This places it in Execute rather than Read. However, the description is empty, lowering confidence. It could range from a simple read/filter to executing arbitrary SQL.

From the tool's definition Tool name 'cbs_query_dataset' and server description mentions 'querying Dutch government open datasets' using 'DuckDB, or Pandas' — querying implies executing queries against data sources.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cbs_query_dataset Rate-limited

cbs_query_dataset 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": {
    "cbs_query_dataset": {
      "limits": [
        {
          "counter": "cbs_query_dataset_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 Nl Opendata, so you can run agents against it safely.

FAQ

Questions about cbs_query_dataset

What does the cbs_query_dataset tool do? +

cbs_query_dataset. It is categorised as a Execute tool in the Nl Opendata MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cbs_query_dataset? +

Register the Nl Opendata MCP server in PolicyLayer and add a rule for cbs_query_dataset: 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 Nl Opendata. Nothing to install.

What risk level is cbs_query_dataset? +

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

Can I rate-limit cbs_query_dataset? +

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

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

cbs_query_dataset is provided by the Nl Opendata MCP server (soulnai/nl-opendata-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.