payments_categories

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

With no annotations, the description carries the full burden of revealing behavior. The verb 'List' clearly signals a read-only operation, which rules out mutation, but no additional behavioral traits such as ordering, filtering, localization, or inactive-item visibility are disclosed. For a zero-parameter read-only tool, this is minimal but acceptable.

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 focused sentence with no filler or redundant detail. It front-loads the action and resource, making it an appropriately minimal definition for a simple list endpoint.

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 description is enough to invoke a parameterless list endpoint, but it does not clarify what payment categories represent or how they relate to payments_types or payment creation tools. With no output schema, the return values are only vaguely specified as 'categories,' leaving the agent to guess at the response shape.

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 zero properties, and schema description coverage is 100% because there is nothing to document. The description adds no parameter-level meaning, but none is needed; a baseline 4 applies for parameterless tools.

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 clear imperative verb and resource: 'List' + 'payment categories.' It does not, however, distinguish categories from the sibling payments_types tool, which could plausibly refer to an overlapping resource, so it stops short of a 5.

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?

There is no explicit guidance on when to use this tool versus alternatives such as payments_types or other payment reference list tools. The only hint is the tool name and resource, leaving the agent to infer its intended role in the payment workflow.

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