get_billing_item

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

No annotations exist, so the description must disclose behavior. It only states the basic operation, omitting whether the tool is read-only, requires permissions, or handles missing items. The agent is left to assume it is a simple read.

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 short sentence, very concise and front-loaded. However, it sacrifices informativeness for brevity, leaving out important details.

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 the simple nature of a 'get' operation and the presence of an output schema, the description is minimally adequate. It covers the core purpose but lacks details on error handling, prerequisites, or result format.

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?

With 0% schema description coverage, the description should explain what 'project_id' and 'billing_item_id' represent. It merely repeats the parameter names without adding meaning, forcing the agent to rely solely on the uninformative schema.

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 the action ('Get'), the resource ('billing item'), and the scope ('on a project'). This is specific and distinguishes from sibling tools like 'list_project_billing_codes' or 'update_billing_item'.

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?

No explicit guidance on when to use this tool vs alternatives, but the name and context imply it is for retrieving a single billing item by ID. No when-not-to-use or alternative suggestions are provided.

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