billing_getCatalogItemListV1

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

No annotations are provided, so the description carries the full burden. It does disclose that prices are displayed as integers without a decimal point (e.g., 1799 for 17.99), which is a useful behavioral detail. However, it doesn't mention that the operation is read-only, rate limits, or pagination, leaving gaps that annotations would normally fill.

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 three sentences, each with a clear role: purpose, price formatting detail, and usage context. No extraneous information is included.

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 that the tool has only two optional parameters and no nested objects, the description covers the essential aspects: what it does, price display behavior, and recommended usage. It lacks a few details like whether results are paginated or if sorting is supported, but for a simple catalog list, it is largely complete.

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 100% description coverage for its two parameters. The description does not add any additional meaning to the parameters beyond what is already in the schema. Per guidelines, when schema coverage is high, baseline is 3, and the description does not improve upon it.

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 clearly states 'Retrieve catalog items available for order.' It specifically identifies the resource (catalog items) and action (retrieve), and the sibling tools are mostly billing operations that don't overlap with catalog listing, so it stands out.

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 says 'Use this endpoint to view available services and pricing before placing orders,' which provides clear context. It does not explicitly mention exclusions or alternatives, but given the sibling tools, it's implicitly the only catalog browsing tool.

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