add_single_item_to_kroger_cart

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

With no annotations provided, the description carries the burden of behavioral disclosure. It does reveal that the add only happens when confirm is true and that it targets the real cart, but it omits other critical behavioral details such as authentication requirements, side effects of adding to a live cart, and what happens if confirm is false.

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?

The description is a single, front-loaded sentence that conveys the core purpose and key condition without any unnecessary words. It is concise and well-structured.

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?

For a tool with 4 parameters and an output schema, the description is too sparse. It does not mention the default confirm=false, which means the tool will not add by default, nor does it address prerequisites like auth. These omissions hinder an agent's ability to use the tool correctly without relying on external context.

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?

The schema has 0% description coverage and includes 4 parameters, but the description only clarifies 'upc' and 'confirm'. The parameters 'modality' and 'quantity' are left unexplained, leaving a significant gap in parameter understanding.

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 uses a specific verb ('Add') and resource ('real Kroger cart'), and specifies 'one explicit UPC', which distinguishes it from the sibling tool for bulk-adding approved items. The meaning is unambiguous and directly conveys the tool's function.

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?

The description provides a clear condition ('when confirm is true') that indicates when the tool actually performs the add operation. However, it does not explicitly reference alternative tools or state when not to use this tool, so it stops short of full usage guidance.

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