payments_types

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

There are no annotations, so the description carries full responsibility; 'List' does imply a read-only, non-destructive operation, which is a positive signal. However, it does not disclose any additional behavior such as output shape, ordering, permissions, or whether only active types are returned.

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 a single, front-loaded sentence with no filler words, so it is maximally concise for the information it conveys.

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 zero-parameter listing tool this is minimally usable, but it lacks an output schema or any description of the returned payment-type values. Sibling-tool context suggests a larger payments API, and without behavioral or return details the description is adequate but incomplete.

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 input schema has no parameters, and schema description coverage is 100% (trivially). With zero parameters, the baseline is 4; no parameter documentation is needed, and the description cannot add parameter meaning.

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 ('List') and a distinct resource ('payment types'), clearly separating it from sibling tools like payments_categories, payments_currencies, and payments_bank_accounts. It does not elaborate on what a payment type is, but the core purpose is unambiguous.

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?

Provides no guidance on when to use this tool instead of the many payment-related siblings such as payments_categories or payments_list_prescriptions. There is no mention of context, exclusions, or relationships to other tools, so the agent must infer usage solely from the name.

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