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

Annotations already show the operation is not read-only, not idempotent, and not destructive. The description adds meaningful behavioral context beyond the annotations: it creates a link rather than directly charging, and explicitly states that payment requires human confirmation—preventing an agent from assuming an automated purchase.

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 two short sentences with no filler. It front-loads the core action, then adds the important human-confirmation caveat. Every sentence carries necessary information.

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?

For a simple one-parameter tool with an output schema and informative annotations, the description is sufficiently complete. It states the core purpose and a key behavioral nuance, while the required schema and output schema cover the remaining details.

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 schema already fully documents the single 'credits' parameter, including allowed values (100, 500, 2000), so the description does not need to add parameter details. With 100% schema coverage, the baseline score of 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 a specific verb ('Creates') and a specific resource ('Stripe checkout link for purchasing AlpineLead agent credits'). It clearly distinguishes itself from read-only credit tools like get_credit_balance and get_credit_packs by focusing on the checkout-creation action.

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 clearly indicates this tool is for creating a Stripe checkout link when purchasing agent credits, giving the agent context on when to invoke it. It does not explicitly name alternatives or exclusion conditions, but the purchase intent is unambiguous given the sibling tools.

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