etsy_checkout

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

No annotations exist, so the description carries the full disclosure burden. It discloses the key prerequisites (logged in, payment configured) and implies a real-world purchase, which signals a consequential, non-read-only action. It does not disclose failure behavior, whether the purchase is reversible, or what confirmation the tool returns, which matters for a financially impactful action.

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?

Two sentences totaling roughly 15 words, with the primary action front-loaded in the first sentence. Every sentence earns its place — the first states what the tool does and the second states the critical precondition — with zero filler.

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?

The schema covers all parameters and the description covers the preconditions, so an agent can feasibly invoke the tool correctly. But with no annotations and no output schema, the description leaves gaps around the confirmed-order outcome, error handling, and the irreversible nature of the purchase. Adequate, but thin for a high-stakes financial tool.

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 100%, so the schema fully documents all four parameters including dry_run's safety default and the shipping_address fallback behavior. The description adds no parameter-specific meaning beyond the schema. The baseline 3 applies.

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 states a specific verb and resource: 'Proceed to checkout and purchase items in the cart.' This clearly differentiates the tool from siblings like etsy_view_cart and etsy_add_to_cart, which do not complete a purchase. However, it does not explicitly name an alternative tool, so differentiation is implicit rather than stated.

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 gives a clear precondition — 'Requires being logged in with payment method configured' — which tells the agent what state must hold before calling. But it offers no explicit when-to-use or when-not-to-use guidance relative to siblings, nor does it indicate that a cart must be populated first via etsy_add_to_cart. Usage context is implied by the checkout/purchase action but never spelled out.

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