get_productA product across stores: product photo, current offers with prices in BRL, lowest price, 30-day price stats, review summary, pros/cons, specs and FAQ. Markdown in Brazilian Portuguese.
| Name | Required | Description | Default |
|---|---|---|---|
| id | Yes | Product id, the UUID in https://pechincha.ai/produto/<id>/<slug> |
| Name | Required | Description | Default |
|---|---|---|---|
| product | Yes | null when the product does not exist |
Changes observed during successful MCP inspections.
Output schema / properties / product / anyOfPrevious value: -[
- {
- "additionalProperties": false,
- "properties": {
- "id": {
- "type": "string"
- },
- "image_url": {
- "description": "Product photo",
- "type": [
- "string",
- "null"
- ]
- },
- "lowest_price": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "lowest_price_store": {
- "type": [
- "string",
- "null"
- ]
- },
- "name": {
- "type": "string"
- },
- "offers": {
- "items": {
- "additionalProperties": false,
- "properties": {
- "coupon_code": {
- "type": [
- "string",
- "null"
- ]
- },
- "expired": {
- "type": "boolean"
- },
- "price": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "store": {
- "type": [
- "string",
- "null"
- ]
- },
- "url": {
- "type": "string"
- }
- },
- "required": [
- "store",
- "price",
- "coupon_code",
- "expired",
- "url"
- ],
- "type": "object"
- },
- "type": "array"
- },
- "price_stats": {
- "anyOf": [
- {
- "additionalProperties": false,
- "properties": {
- "avg": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "max": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "min": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "records": {
- "type": "integer"
- }
- },
- "required": [
- "min",
- "avg",
- "max",
- "records"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
- ]
- },
- "url": {
- "type": "string"
- }
- },
- "required": [
- "id",
- "name",
- "url",
- "image_url",
- "lowest_price",
- "lowest_price_store",
- "offers",
- "price_stats"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
-]New value: +[
+ {
+ "additionalProperties": false,
+ "properties": {
+ "cons": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "faq": {
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "answer": {
+ "type": "string"
+ },
+ "question": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "question",
+ "answer"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "id": {
+ "type": "string"
+ },
+ "image_url": {
+ "description": "Product photo",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "lowest_price": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "lowest_price_store": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "name": {
+ "type": "string"
+ },
+ "offers": {
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "coupon_code": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "expired": {
+ "type": "boolean"
+ },
+ "id": {
+ "description": "Deal id, for get_deal",
+ "type": "string"
+ },
+ "price": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "store": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "store",
+ "price",
+ "coupon_code",
+ "expired",
+ "url"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "price_stats": {
+ "anyOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "avg": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "max": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "min": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "records": {
+ "type": "integer"
+ }
+ },
+ "required": [
+ "min",
+ "avg",
+ "max",
+ "records"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "pros": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "review_summary": {
+ "description": "Summary of reviews and expert opinion",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "specs": {
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "key": {
+ "type": "string"
+ },
+ "value": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "key",
+ "value"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "summary": {
+ "description": "Price facts: discount, price verdict and history",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "name",
+ "url",
+ "image_url",
+ "lowest_price",
+ "lowest_price_store",
+ "offers",
+ "price_stats",
+ "summary",
+ "review_summary",
+ "pros",
+ "cons",
+ "specs",
+ "faq"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+]Output schema / properties / product / anyOfPrevious value: -[
- {
- "additionalProperties": false,
- "properties": {
- "id": {
- "type": "string"
- },
- "lowest_price": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "lowest_price_store": {
- "type": [
- "string",
- "null"
- ]
- },
- "name": {
- "type": "string"
- },
- "offers": {
- "items": {
- "additionalProperties": false,
- "properties": {
- "coupon_code": {
- "type": [
- "string",
- "null"
- ]
- },
- "expired": {
- "type": "boolean"
- },
- "price": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "store": {
- "type": [
- "string",
- "null"
- ]
- },
- "url": {
- "type": "string"
- }
- },
- "required": [
- "store",
- "price",
- "coupon_code",
- "expired",
- "url"
- ],
- "type": "object"
- },
- "type": "array"
- },
- "price_stats": {
- "anyOf": [
- {
- "additionalProperties": false,
- "properties": {
- "avg": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "max": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "min": {
- "description": "BRL",
- "type": [
- "number",
- "null"
- ]
- },
- "records": {
- "type": "integer"
- }
- },
- "required": [
- "min",
- "avg",
- "max",
- "records"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
- ]
- },
- "url": {
- "type": "string"
- }
- },
- "required": [
- "id",
- "name",
- "url",
- "lowest_price",
- "lowest_price_store",
- "offers",
- "price_stats"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
-]New value: +[
+ {
+ "additionalProperties": false,
+ "properties": {
+ "id": {
+ "type": "string"
+ },
+ "image_url": {
+ "description": "Product photo",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "lowest_price": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "lowest_price_store": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "name": {
+ "type": "string"
+ },
+ "offers": {
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "coupon_code": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "expired": {
+ "type": "boolean"
+ },
+ "price": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "store": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "store",
+ "price",
+ "coupon_code",
+ "expired",
+ "url"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "price_stats": {
+ "anyOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "avg": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "max": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "min": {
+ "description": "BRL",
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "records": {
+ "type": "integer"
+ }
+ },
+ "required": [
+ "min",
+ "avg",
+ "max",
+ "records"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "name",
+ "url",
+ "image_url",
+ "lowest_price",
+ "lowest_price_store",
+ "offers",
+ "price_stats"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+]Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavioral context beyond the annotations: the response is Markdown rendered in Brazilian Portuguese and prices are denominated in BRL, both of which materially affect how an agent consumes the result.
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?
Two sentences, no filler, and the payload inventory is front-loaded so the agent learns the scope immediately. The output-format caveat is correctly placed last as a secondary detail.
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?
With one fully documented parameter, an output schema present, and annotations covering the safety profile, the description only needs to add scope and format, which it does. The main residual gap is routing guidance against the many sibling lookup tools.
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?
There is a single parameter and schema description coverage is 100% — the schema already explains that 'id' is the UUID from the pechincha.ai product URL. The description adds nothing about the identifier, so the baseline of 3 applies; the schema is doing all the work.
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 enumerates exactly what the resource is (a product aggregated across stores) and what comes back: photo, offers with BRL prices, lowest price, 30-day stats, reviews, pros/cons, specs, FAQ. It is a noun phrase rather than a verb+resource, but the content is specific enough to separate it from siblings like get_price_history or get_similar_deals. It stops short of naming any sibling explicitly.
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?
Usage is only implied: the breadth of the payload (offers, stats, reviews, specs) suggests this is the comprehensive single-product lookup. There is no statement of when to prefer it over get_price_history, get_similar_deals, or get_deal, and no prerequisites or exclusions are given.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.