place_order

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

Without annotations, the description must carry the full burden of behavioral disclosure. It only states the action and parameters, but omits side effects (e.g., cart becomes inactive), success/failure responses, or idempotency. The '(AUTH'D)' marker is insufficient.

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 concise but uses an 'Args' block that is somewhat informal. It front-loads the purpose and lists parameters efficiently. Minor improvement could integrate parameter docs more seamlessly.

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?

Given 4 parameters and an output schema, the description covers parameter semantics but lacks usage context (e.g., prerequisites, error scenarios). The tool's complexity warrants more guidance on when and how to use it, which is absent.

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?

Schema coverage is 0%, so the description compensates by explaining each parameter: cart_id (mandatory), payment_method_id (optional), payment_type (with examples), and tip_amount (optional). This adds meaning beyond the schema's titles and types, though defaults and constraints could be clearer.

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 clearly states the tool's purpose: 'place an order from a cart.' It uses a specific verb ('place') and resource ('order from a cart'), which distinguishes it from sibling tools like 'add_to_cart' or 'get_order'.

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 no guidance on when to use this tool versus alternatives, nor does it mention prerequisites like having a valid cart, being logged in, or the need for payment method. The '(AUTH'D)' hint is minimal.

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