get_payment_url

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

With no annotations provided, the description carries full disclosure burden. It identifies 'Stripe' as the payment processor and 'top up' as the transaction type, providing useful context. However, it doesn't clarify whether this creates server-side checkout state, idempotency concerns, or that it returns a redirect URL rather than processing payment immediately.

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 single sentence is perfectly sized with no wasted words. 'Stripe' and 'top up' provide essential context without verbosity. Information is front-loaded and structured for immediate comprehension.

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 the tool's simplicity (1 primitive parameter, no nested objects) and clear naming convention, the description provides sufficient context for invocation. However, without an output schema, it could explicitly confirm the return type is a URL string.

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%, documenting amount_usd thoroughly. The description mentions 'top up' which aligns semantically with the parameter purpose, but adds no syntax details, validation rationale, or usage examples beyond what the schema already provides. Baseline 3 is appropriate.

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 specific verb 'Get' and identifies the resource 'Stripe checkout URL' clearly. It specifies the business purpose 'to top up Rhumb credits', distinguishing it from sibling tools like check_balance or budget which view credits rather than initiate purchases.

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 implies usage through 'top up Rhumb credits', suggesting it's for purchasing/adding funds. However, it lacks explicit when-to-use guidance comparing it to siblings like check_balance or budget, and doesn't state prerequisites (e.g., authentication requirements).

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