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Jatin-IITB

Open Food Facts MCP Server

by Jatin-IITB

searchByCategory

Find food products by category, such as beverages or snacks. Supports pagination for browsing results.

Instructions

Search products within a specific food category (e.g., beverages, snacks, dairy, cereals)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
categoryYesFood category (e.g., "beverages", "snacks", "dairy", "organic")
pageNo
pageSizeNo
Behavior2/5

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

With no annotations, the description fails to disclose pagination behavior, result limits, or matching criteria beyond the category name.

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?

Short and to the point, but overly minimalistic; could be structured with bullet points or additional details without being verbose.

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

Completeness3/5

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

Adequate for a simple search tool, but lacks information on response format, pagination details, or how categories are matched, especially given no output schema.

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

Parameters2/5

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

Only repeats the category parameter examples from the schema; does not explain page or pageSize parameters despite low schema coverage (33%).

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

Purpose4/5

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

The description clearly states the tool searches products by food category with examples, but it does not differentiate from sibling tools like searchByBrand or searchProducts.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives; lacks any 'when to use' or 'when not to use' context.

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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