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malkreide

Zurich Open Data MCP Server

by malkreide

zurich_search_datasets

Read-onlyIdempotent

Search the City of Zurich's open data catalog for datasets. Use natural language queries with filters and sorting to find relevant data across 900+ datasets.

Instructions

Durchsucht den Open-Data-Katalog der Stadt Zürich nach Datensätzen.

Nutzt die CKAN-Suchmaschine (Solr) für Volltextsuche über Titel, Beschreibung, Tags und Metadaten aller 900+ Datensätze.

Returns: Strukturiertes SearchResult (JSON, IDs maschinenlesbar zum Verketten mit zurich_get_dataset) plus lesbares Markdown.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
countNoNumber of datasets in this page
errorNo
queryYes
totalNo
offsetNo
datasetsNo
next_offsetNoOffset for the next page, or null if exhausted
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, so the agent knows it's a safe read operation. The description adds context about using Solr for full-text search and the return format, but does not detail any limitations or error conditions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise: two short sentences that front-load the action, then explain the search engine and return format. Every sentence is meaningful with no redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity (5 parameters well-documented in schema) and presence of an output schema, the description adequately explains the search mechanism and result usage. It could mention sorting/filtering capabilities, but the schema covers those details.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description does not add meaning beyond what the input schema provides. Since the schema already documents all parameters with descriptions and examples (e.g., query, rows, sort), the description adds no extra value for parameter semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Durchsucht den Open-Data-Katalog der Stadt Zürich nach Datensätzen', specifying the verb (search) and resource (open data catalog). It distinguishes from siblings by mentioning the return format and chaining with zurich_get_dataset.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for general dataset search but does not explicitly state when to use this tool over siblings or when not to use it. No exclusions or alternative suggestions are provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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