checkout_payment_options

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

No annotations are provided, so the description must carry the full behavioral burden. It discloses that login is required, which is useful, but it does not explicitly state that the operation is read-only, what side effects exist, or what safety profile the agent should expect.

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 extremely short, front-loaded, and free of filler. Both sentences are directly relevant, though the first sentence is terser than an ideal purpose statement.

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 tool is a simple zero-parameter query and an output schema exists, so return values need not be described. However, the description omits the checkout flow context and any sibling differentiation, leaving the agent to infer when in the checkout sequence this tool is appropriate.

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 tool has zero parameters, so there is no parameter semantics for the description to explain. The baseline score of 4 applies because the empty schema leaves nothing ambiguous.

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 is a noun phrase that essentially restates the tool name, with no explicit verb such as 'list' or 'get'. It indicates the resource is checkout payment options, but it does not distinguish the tool from checkout-context siblings like checkout_context or checkout_summary.

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 only guidance is the login prerequisite; there is no indication of when to call this tool versus checkout_context, checkout_summary, or other checkout-stage tools. No alternatives or exclusions are mentioned.

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