woroller.de Preisvergleich

Server Details

Deutscher Preisvergleich für E-Roller – Bestpreis-Suche (read-only).

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Status: Unhealthy
Uptime: 96.0% over 66 days
Last Tested: 2026-10-23 04:31
Transport: Streamable HTTP · MCP 2025-11-25
URL

TDQS

A4.3/5.0

Scored 2026-09-23 23:11 across 2 tools

Disambiguation5/5

The two tools have clearly distinct purposes: search_offers is for broad catalog searching with filters, while lookup_product is for retrieving a specific product by ID or URL. There is no overlap or ambiguity.

Naming Consistency5/5

Both tools follow the verb_noun pattern (lookup_product, search_offers) with consistent snake_case naming. The verbs are descriptive and the nouns indicate the resource.

Tool Count3/5

Only two tools for a price comparison service feels thin, but it is justifiable for a read-only domain that requires only search and specific lookup. The count is borderline but not excessive.

Completeness4/5

The tool surface covers the core workflow: searching the catalog with filtering and getting detailed product info. Minor gaps like dedicated brand/category listings are mitigated by facets in search_offers, so no significant dead ends.

Available Tools

2 tools

lookup_productProdukt auf woroller.de per ID/URL nachschlagenA

Read-onlyIdempotent

Inspect

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).

ParametersJSON Schema

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

ParametersJSON 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

TDQS

A4.3/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds clarity by stating the tool is 'read-only' and describes the output (best price, 30-day price stats, offer link). No contradictions; the description complements annotations well.

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

Conciseness4/5

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

The description is bilingual (German and English), which adds some redundancy. However, each sentence serves a purpose: purpose, return info, constraint. It is well-structured and front-loaded. Slightly longer than necessary due to dual language, but still efficient.

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 annotations and output schema, the description provides sufficient context: input constraints, return values, and relationship to sibling tool. It lacks information about error handling or not-found cases, but for a read-only lookup tool, it is largely complete.

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

Parameters4/5

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

Schema coverage is 100%, so baseline is 3. The description adds the important constraint that exactly one of 'id' or 'url' must be specified, which is not captured in the schema. This additional semantic guidance improves parameter usage.

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 looks up a specific product by ID or URL, returning best price, 30-day price stats, and offer link. It distinguishes from sibling 'search_offers' by focusing on concrete product lookup vs general search. Purpose is specific and unambiguous.

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

Usage Guidelines4/5

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

The description explains that exactly one of 'id' or 'url' must be provided, and mentions that 'id' can be an ASIN or externalId from search_offers, linking to the sibling tool. However, it does not explicitly state when to use this tool versus alternatives or when not to use it.

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)A

Read-onlyIdempotent

Inspect

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 den vollen Katalog (mehrere hundert 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.

ParametersJSON Schema

Name	Required	Description
`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

ParametersJSON 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

TDQS

A4.3/5.0

Behavior5/5

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

Annotations already show readOnlyHint=true, idempotentHint=true, and destructiveHint=false, and the description adds meaningful context beyond that: it discloses the output shape, 30-day price trend, facets for refinement, affiliate behavior with unchanged price, and catalog scope of several hundred products. There is no contradiction with the annotations.

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

Conciseness3/5

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

The description is well structured and front-loaded, with purpose and usage at the start followed by output details. However, it is notably longer than necessary because the German content is fully repeated in English, which makes it less concise than it could be.

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

Completeness5/5

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

For a read-only, idempotent search tool with fully described optional parameters and an output schema, the description is complete enough for an agent to select and invoke it correctly. It states triggers, available filters, return fields, facets, and the affiliate link behavior without requiring the agent to infer anything important.

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?

Schema description coverage is 100%, so the schema already documents all parameters and their meaning in detail. The description adds only modest reinforcement by mentioning filters for search term, brand, and price range, but it does not add major new parameter semantics beyond the schema.

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 opens with a specific verb and resource: 'Findet E-Roller zum guenstigsten aktuellen Preis in Deutschland (EUR) ueber Amazon, eBay und AliExpress'. It also clarifies the tool searches the full catalog and returns offers, which clearly communicates the tool's role and differentiates it from the sibling lookup_product.

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

Usage Guidelines4/5

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

The description explicitly states when to use the tool: 'Nutze dieses Tool, wenn ein Nutzer nach Preis, Angebot, guenstig, wo kaufen oder einem konkreten E-Roller fragt.' This is strong trigger guidance, but it does not explicitly name the sibling tool or describe when not to use it.

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

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

2 tool updatesJul 7, 2026

Changedlookup_product5 fields changed

addedOutput schema / properties / facets

Added value: +{
+  "description": "Verfuegbare Filter-Werte (Marke + domain-spezifische Attribute) mit Trefferzahlen — zum gezielten Nachfiltern via query/brand/minPrice/maxPrice.",
+  "type": "array"
+}

addedOutput schema / properties / products / items / properties / attributes

Added value: +{
+  "description": "Domain-spezifische Filter-Attribute, z.B. {farbe, watt, speicher, reichweite}.",
+  "type": "object"
+}

addedOutput schema / properties / products / items / properties / brand
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / products / items / properties / detailUrl

Added value: +{
+  "description": "Zitierfaehige Produktseite mit Preisverlauf.",
+  "type": "string"
+}

addedOutput schema / properties / products / items / properties / priceStats / description
```
Added value: +"30-Tage-Preisstatistik (avg/min/max, isLowest30d)."
```

Changedsearch_offers11 fields changed

addedInput schema / properties / brand

Added value: +{
+  "description": "Auf eine Marke einschraenken (exakter Wert aus facets.marke, z.B. \"Nike\").",
+  "type": "string"
+}

changedInput schema / properties / limit / description

Previous value: -"Maximale Anzahl Ergebnisse (Default 24, max 50)."New value: +"Maximale Anzahl Ergebnisse (Default 24, max 100)."

changedInput schema / properties / limit / maximum
```
Previous value: -50New value: +100
```

addedInput schema / properties / maxPrice

Added value: +{
+  "description": "Hoechstpreis in EUR (optional).",
+  "type": "number"
+}

addedInput schema / properties / minPrice

Added value: +{
+  "description": "Mindestpreis in EUR (optional).",
+  "type": "number"
+}

changedInput schema / properties / query / description

Previous value: -"Optionaler Suchbegriff — filtert nach Titel, Marke oder Haendler."New value: +"Suchbegriff, z.B. Modell/Marke/Eigenschaft (\"Balkonkraftwerk 800W\", \"iPhone 15 schwarz\"). Optional."

addedOutput schema / properties / facets

Added value: +{
+  "description": "Verfuegbare Filter-Werte (Marke + domain-spezifische Attribute) mit Trefferzahlen — zum gezielten Nachfiltern via query/brand/minPrice/maxPrice.",
+  "type": "array"
+}

addedOutput schema / properties / products / items / properties / attributes

Added value: +{
+  "description": "Domain-spezifische Filter-Attribute, z.B. {farbe, watt, speicher, reichweite}.",
+  "type": "object"
+}

addedOutput schema / properties / products / items / properties / brand
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / products / items / properties / detailUrl

Added value: +{
+  "description": "Zitierfaehige Produktseite mit Preisverlauf.",
+  "type": "string"
+}

addedOutput schema / properties / products / items / properties / priceStats / description
```
Added value: +"30-Tage-Preisstatistik (avg/min/max, isLowest30d)."
```

2 tool updatesJul 6, 2026
- First observedlookup_product
- First observedsearch_offers

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