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get_city

Read-onlyIdempotent

Fetch city master data (population, area, coordinates) from Wikidata by providing a city slug like 'berlin'.

Instructions

Stammdaten einer Stadt (Einwohner, Flaeche, Geo) via Wikidata.

Args: slug: Stadt-Slug, z.B. "berlin" oder "hamburg".

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
slugYes
Behavior4/5

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

Annotations already declare readOnlyHint, destructiveHint, idempotentHint, openWorldHint. The description adds value by specifying the data source (Wikidata) and the type of data returned (population, area, geo), which goes beyond annotations.

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 extremely concise, consisting of two sentences plus an Args block. Every sentence adds value without 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?

For a simple read-only tool with one parameter and no output schema, the description adequately covers what the tool does and returns. Minor omission: no mention of rate limits or whether it's limited to German cities, but not critical.

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

Parameters5/5

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

With schema description coverage at 0%, the description fully compensates by explaining the 'slug' parameter with concrete examples ('berlin', 'hamburg'), clarifying its meaning and format.

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 the tool retrieves master data of a city (population, area, geo) via Wikidata, using a specific verb ('get') and resource ('Stammdaten einer Stadt'). This distinguishes it from siblings like 'list_cities' that list cities.

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 obtaining city master data but does not explicitly state when to use this tool over alternatives (e.g., 'list_cities', 'geo'). No when-not or prerequisites are mentioned.

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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