get_project_billing_codes

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 only states 'Get available billing codes' without revealing behavioral traits like read-only nature, rate limits, or response format. With no annotations, this is insufficient.

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 sentence, which is concise but lacks structure and detail. It is not wasteful but fails to earn its place with valuable information. Score 3 for acceptable length without being overly verbose.

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?

With only one parameter and an output schema (not shown), the description is minimally complete. It identifies the tool's purpose but does not explain return values or behavior. Given the low complexity, it is adequate but not thorough.

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 one parameter 'project_id' with 0% description coverage. The description adds no meaning beyond the schema, failing to clarify what project_id refers to or any constraints. This is poor given the lack of schema descriptions.

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 indicates a retrieval operation for project-specific billing codes. The verb 'Get' and resource 'billing codes' are specific, and while it doesn't explicitly differentiate from siblings like 'get_org_billing_codes', the name itself provides context. Score 4 for clear action and resource.

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 guidance on when to use this tool versus alternatives such as 'get_org_billing_codes' or 'get_project_billing_settings'. The description lacks context on prerequisites or use cases, making it hard for an agent to decide when to invoke this tool.

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