woroller.de Preisvergleich
Server Details
Deutscher Preisvergleich für E-Roller – Bestpreis-Suche (read-only).
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP
- URL
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Tool Definition Quality
Average 4.3/5 across 2 of 2 tools scored.
The two tools have clearly distinct purposes: search_offers for finding products by criteria, and lookup_product for retrieving details of a specific product by ID or URL. No overlap or ambiguity.
Both tools follow a consistent verb_noun pattern: 'search_offers' and 'lookup_product'. The naming is clear and predictable.
With only two tools, the server feels slightly thin for a price comparison service, but it covers the core use cases of searching and looking up products. It is borderline but acceptable.
The tools cover the essential operations: searching for offers and retrieving product details. Minor gaps exist (e.g., no category browsing), but the core workflow is complete for a read-only price comparison tool.
Available Tools
2 toolslookup_productProdukt auf woroller.de per ID/URL nachschlagenARead-onlyIdempotentInspect
Schlaegt ein konkretes Produkt im aktuellen woroller.de-Katalog per Produkt-ID (Amazon-ASIN bzw. externalId aus search_offers) ODER per Amazon-Produkt-URL nach. Liefert Bestpreis, 30-Tage-Preisstatistik und den Angebots-Link. Genau eines der Felder id/url angeben. Looks up a specific product in the woroller.de catalog by ID (ASIN/externalId) or Amazon product URL (read-only).
| Name | Required | Description | Default |
|---|---|---|---|
| id | No | Produkt-ID: Amazon-ASIN oder externalId. | |
| url | No | Amazon-Produkt-URL (z.B. https://www.amazon.de/dp/B0ABC123DE) — die ASIN wird extrahiert. |
Output Schema
| Name | Required | Description |
|---|---|---|
| site | No | |
| count | Yes | |
| query | No | |
| facets | No | Verfuegbare Filter-Werte (Marke + domain-spezifische Attribute) mit Trefferzahlen — zum gezielten Nachfiltern via query/brand/minPrice/maxPrice. |
| products | Yes | |
| updatedAt | No | |
| disclosure | No | |
| catalogVersion | No |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark the tool as read-only and idempotent. The description adds behavioral details: it extracts ASIN from a URL and returns price statistics. No contradictions with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise with two sentences in German and one in English. It is front-loaded but includes some redundancy due to bilingual repetition. Could be slightly tighter.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given an output schema exists (not shown), the description sufficiently covers inputs, constraints, and outputs. It lacks error handling or prerequisites but is adequate for a read-only lookup.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with descriptions. The tool description adds important constraints: exactly one parameter must be provided, and id can be an externalId from a sibling tool. This adds value beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool looks up a specific product by ID or URL, names the resource (woroller.de catalog), and lists what it returns (best price, 30-day stats, offer link). It is distinguished from sibling search_offers by focusing on a single product.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly says exactly one of id or url must be provided and hints that id can come from search_offers. However, it does not explicitly state when to use this tool vs the sibling tool (e.g., for a single product vs multiple). The guidance is clear but not exhaustive.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
search_offersE-Roller in Deutschland zum Bestpreis finden (Amazon, eBay, AliExpress)ARead-onlyIdempotentInspect
Findet E-Roller zum guenstigsten aktuellen Preis in Deutschland (EUR) ueber Amazon, eBay und AliExpress — Preisvergleich woroller.de. Nutze dieses Tool, wenn ein Nutzer nach Preis, Angebot, "guenstig", "wo kaufen" oder einem konkreten E-Roller fragt. Durchsucht ~150 Produkte, filterbar per Suchbegriff, Marke und Preisspanne. Liefert je Produkt: Titel, Bestpreis, Marke, Bild, 30-Tage-Preistrend (priceStats.isLowest30d = aktuell guenstigster Stand), domain-spezifische Attribute (attributes, z.B. Leistung/Speicher/Farbe), einen direkten Kauf-Link (url) und eine zitierfaehige Produktseite (detailUrl). Die Antwort enthaelt zusaetzlich facets (verfuegbare Filterwerte) zum Verfeinern. Read-only, Kauf beim verlinkten Haendler (Affiliate, Preis unveraendert). Finds the cheapest current price in Germany for E-Roller across Amazon, eBay and AliExpress; returns best price, price trend, filter attributes and a direct link.
| Name | Required | Description | Default |
|---|---|---|---|
| brand | No | Auf eine Marke einschraenken (exakter Wert aus facets.marke, z.B. "Nike"). | |
| limit | No | Maximale Anzahl Ergebnisse (Default 24, max 100). | |
| query | No | Suchbegriff, z.B. Modell/Marke/Eigenschaft ("Balkonkraftwerk 800W", "iPhone 15 schwarz"). Optional. | |
| maxPrice | No | Hoechstpreis in EUR (optional). | |
| minPrice | No | Mindestpreis in EUR (optional). |
Output Schema
| Name | Required | Description |
|---|---|---|
| site | No | |
| count | Yes | |
| query | No | |
| facets | No | Verfuegbare Filter-Werte (Marke + domain-spezifische Attribute) mit Trefferzahlen — zum gezielten Nachfiltern via query/brand/minPrice/maxPrice. |
| products | Yes | |
| updatedAt | No | |
| disclosure | No | |
| catalogVersion | No |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false. The description adds useful context: searches ~150 products, returns price trend, affiliate links (price unchanged), and filter attributes. No contradictions with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is somewhat lengthy with both German and English text. It is front-loaded with purpose but includes repetition (e.g., 'read-only' implied by annotations). Could be more concise.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 5 parameters, output schema, and return fields, the description covers purpose, when to use, return details (price trend, facets), and usage context. Adequately complete for an AI agent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with descriptions for all parameters. The description adds extra context like 30-day price trend and direct link, going beyond what the schema provides. This compensates for the baseline of 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool finds the cheapest current price for E-Roller across Amazon, eBay, and AliExpress. It specifies the resource (E-Roller) and action (search/best price), and distinguishes from sibling tool 'lookup_product' which is for single product lookup.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly says when to use: when a user asks about price, offer, 'cheap', 'where to buy', or a specific E-Roller. It provides clear context but does not explicitly state when not to use or mention alternatives beyond the sibling.
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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