Get product stock quantity

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

Annotations already declare readOnlyHint=true, openWorldHint=true, and idempotentHint=true, covering the safety profile. The description adds only that the returned quantity is 'current', which is mild behavioral context but does not disclose potential caveats such as data freshness, units, or whether the quantity represents available vs. physical stock. Since annotations carry most of the burden, a mid-range score is appropriate.

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 or repetition. It conveys the action, the resource, and the returned information efficiently.

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 getter with rich annotations, the description is nearly complete. It tells the agent what will be returned ('current inventory quantity'). However, since there is no output schema, a slightly more explicit statement about the return format could improve completeness, though it is not essential for such a trivial tool.

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 provides 100% coverage with a clearly described 'id' parameter. The description does not add any parameter-level meaning beyond what the schema states, so the baseline score of 3 applies.

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 names a specific verb ('Returns'), a specific resource ('inventory quantity'), and the target ('a product'). This clearly distinguishes it from siblings like billingo_get_product, which would return broader product details. The tool's name and title reinforce the purpose without adding confusion.

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 gives no guidance about when to use this tool versus alternatives such as billingo_get_product or billingo_list_products. There is no stated context, prerequisite, or condition that would help an agent choose it over similar product-related tools.

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