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Jatin-IITB

Open Food Facts MCP Server

by Jatin-IITB

getAllergenCheck

Check if a food product contains a specific allergen like gluten, milk, or nuts using its name or barcode.

Instructions

Check if a product contains a specific allergen (gluten, milk, eggs, nuts, peanuts, soy, fish, shellfish, etc.)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameOrBarcodeYesProduct name or barcode
allergenYesAllergen to check for (e.g., "gluten", "milk", "eggs", "nuts", "peanuts", "soy", "fish", "shellfish")
Behavior2/5

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

With no annotations, description must fully disclose behavior. It only states 'check if contains allergen' without clarifying return format (e.g., boolean), accuracy, error handling, or scope (e.g., based on ingredient list only).

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?

Single sentence, no redundant words, front-loaded with key information. Maximum efficiency.

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

Completeness2/5

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

No output schema, so description should explain return values (e.g., boolean, allergen status). It omits this, and also lacks error handling info or performance notes. Incomplete for agent decision-making.

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 coverage is 100% with both parameters described. The description adds example allergen values, slightly extending the schema. Baseline is 3 due to high coverage.

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 verb 'check' and the resource 'product allergen', listing common allergens. It effectively distinguishes from siblings like checkMultipleAllergens by indicating single allergen checking.

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 vs alternatives (e.g., checkMultipleAllergens for multiple checks, or searchProducts for general lookup). Missing context on prerequisites or exclusions.

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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