place_order

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

No annotations are provided, so the description carries the full burden. It usefully discloses the authentication requirement, but for a money-moving mutation it says nothing about whether the order is immediately charged, what happens on payment failure, or whether repeat calls create duplicate orders.

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?

One sentence of purpose followed by a compact Args block; the primary intent is front-loaded and nothing is padded. The header sentence repeats slightly with the cart_id line but costs almost nothing.

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?

An output schema exists, so return values need no explanation, and all three parameters plus the auth prerequisite are covered. What is missing for a payment mutation with zero annotations is failure/duplicate-order behavior and any confirmation semantics.

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 description coverage is 0% and the schema titles are bare camelCase, so the description does the documentation work: payment_method_id falls back to a default when omitted (the schema only shows default: null, not the fallback behavior) and tip_amount is specified in dollars, a unit the schema omits entirely.

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?

States a specific verb and resource ('Place an order from a cart'), so an agent immediately knows this converts a cart into a submitted order, which distinguishes it from read-side siblings like get_order and track_order. It stops short of explicitly contrasting itself with reorder or create_cart.

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 'Requires authentication' line establishes a precondition, and the verb implies this is the terminal step after add_to_cart/update_cart_item. However there is no explicit when-to-use guidance and no mention of alternatives such as reorder for past orders, so usage must be inferred from the name.

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