zurich_datastore_query

THE RISK

Low Risk

Why zurich_datastore_query needs a policy

This is a read-only tool that retrieves data from a public data repository. While it accesses potentially sensitive or real-time data (city services, environmental records, parliamentary data), it cannot modify, delete, or execute arbitrary code.

From the tool's definition Tool name 'zurich_datastore_query' and description 'Queries tabular data directly from the CKAN DataStore' indicate a query-only operation with no modification capability. The word 'Fragt' (queries) and 'abfragen' (to query) imply retrieval of data.

Documented attack patterns abuse exactly the kind of access zurich_datastore_query gives an agent:

POLICY

How to control zurich_datastore_query

PolicyLayer is an MCP gateway — it sits between your AI agents and Zurich Open Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for zurich_datastore_query:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "zurich_datastore_query": {}
  }
}

zurich_datastore_query is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Zurich Open Data MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Zurich Open Data MCP Server tools

Execute zurich_datastore_sql Führt eine SQL-Abfrage auf dem CKAN DataStore aus. Read get_beschluesse_by_departement get_beschluesse_by_departement Read get_stadtratsbeschluss_detail get_stadtratsbeschluss_detail Read search_stadtratsbeschluesse search_stadtratsbeschluesse Read zurich_air_quality Liefert stündlich aktualisierte Luftqualitätsmessungen aus Zürich. Read zurich_analyze_datasets zurich_analyze_datasets Read zurich_catalog_stats Gibt einen Überblick über den gesamten Open-Data-Katalog der Stadt Zürich. Read zurich_find_school_data zurich_find_school_data

All 24 Zurich Open Data MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about zurich_datastore_query

What does the zurich_datastore_query tool do? +

Fragt tabellarische Daten direkt aus dem CKAN DataStore ab. It is categorised as a Read tool in the Zurich Open Data MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on zurich_datastore_query? +

Register the Zurich Open Data MCP Server MCP server in PolicyLayer and add a rule for zurich_datastore_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 Zurich Open Data MCP Server. Nothing to install.

What risk level is zurich_datastore_query? +

zurich_datastore_query is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit zurich_datastore_query? +

Yes. Add a rate_limit block to the zurich_datastore_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.

How do I block zurich_datastore_query completely? +

Set action: deny in the PolicyLayer policy for zurich_datastore_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.

What MCP server provides zurich_datastore_query? +

zurich_datastore_query is provided by the Zurich Open Data MCP Server MCP server (pypi:zurich-opendata-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Zurich Open Data MCP Server tool call.

Start from Zurich Open Data MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →