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picnic-mcp

picnic-mcp

by jlb-jlb

Remove a recipe from the cart

remove_recipe_from_cart
DestructiveIdempotent

Remove a recipe's ingredients from the Picnic cart by recipe ID to reverse a previous recipe addition.

Instructions

Take a recipe's ingredients out of the cart again.

Input Schema

NameRequiredDescriptionDefault
recipe_idYesRecipe id from search_recipes or create_recipe

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

C2.5/5.0
Behavior2/5

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

Annotations already declare destructiveHint=true, idempotentHint=true, openWorldHint=true, and readOnlyHint=false, so the safety profile is fully covered by structured data. The description adds essentially nothing beyond that — it does not say whether the recipe itself is deleted, whether already-placed orders are affected, or what state the cart is left in.

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?

It is a single short sentence with no padding, which is good, but it is under-specified rather than concise. The vague word 'again' consumes space without adding information.

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?

For a destructive, open-world mutation with no output schema, the description omits what an agent most needs: the blast radius of the removal and the resulting cart state. With only one well-documented parameter the schema burden is low, but the behavioral gap is not filled anywhere else.

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% and the single recipe_id parameter is already documented as coming from search_recipes or create_recipe. The description contributes no additional meaning about the identifier, so baseline 3 applies.

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

Purpose3/5

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

The verb phrase 'take ... out of the cart' with the resource 'a recipe's ingredients' gives a rough sense of the action, but the trailing 'again' adds ambiguity rather than specificity. It does not distinguish itself from the sibling tools remove_from_cart or clear_cart, so an agent cannot tell whether it removes one ingredient, a recipe's whole contribution, or everything.

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?

There is no statement of when to use this instead of remove_from_cart, clear_cart, or add_recipe_to_cart. The word 'again' faintly implies it reverses an earlier add_recipe_to_cart, but the agent has to infer that pairing rather than being told.

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