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MCP Server to keep track of what's in your pantry. Uses GitHub social for authentication.
This is a solid, production-ready MCP server with well-structured tool definitions. All three tools have clear names following verb_noun convention (list_, add_, remove_), descriptions that explain purpose and state mutability, and complete input schemas with type definitions and field descriptions. However, there are gaps in output schema documentation and parameter constraint enforcement that prevent a higher score. The tool descriptions are appropriately detailed (150-250 chars) and include helpful context about prerequisites (listing before add/remove). All parameters have type definitions and descriptions. Error handling is present but could be more prescriptive about recovery paths. The lack of documented output schema and absence of tool annotations (readOnlyHint, destructiveHint) are the primary limitations preventing this from reaching 80+.
Add an item to the pantry or update quantity if it already exists. Always list pantry items prior to adding new ones in order to reuse correct names, package types, and package sizes if items already exist.
List all items in the pantry
Remove an item from the pantry or decrease quantity if some remains. Always list pantry items prior to removing them in order to use correct names, package types, and package sizes.
Output schema not documented. listPantryItems returns JSON text without a formal schema definition for downstream tool consumption. addPantryItem and removePantryItem return plain text success messages instead of structured objects with item state and IDs.
Tool annotations missing. addPantryItem and removePantryItem have risk classifications (WRITE, DESTRUCTIVE) stated in metadata but not exposed as tool annotations (readOnlyHint, destructiveHint). This prevents LLM-side filtering and confirmation workflows.
Parameter constraint descriptions could be more actionable. packageType and packageSize have maxLength constraints but no enum of valid values (bottle, box, bag, tray are examples, not exhaustive). LLM may hallucinate invalid values. No regex or pattern constraint visible.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | C | 68 | 2026-07-28+ | v2 |
| 2026-03-09 | D | 59 | - | v1 |
Error messages are generic. addPantryItem catches all errors as 'Failed to add item: [message]' without distinguishing retryable failures (DB timeout) from user-fixable ones (invalid name). removePantryItem does better (ItemNotFound, InsufficientQuantity are explicit), but still lacks recovery guidance.
No pagination support. listPantryItems returns all items as a single JSON block. For pantries with thousands of items, this bloats context and wastes tokens. No limit, offset, or cursor parameter.