List Billing Account Projects

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'List' implies a read-only operation, it doesn't address authentication requirements, rate limits, error conditions, or what the return format looks like. For a tool with no annotation coverage, this leaves significant behavioral gaps unaddressed.

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, efficient sentence that states the core purpose without unnecessary words. It's appropriately sized for a straightforward listing tool and front-loads the essential information immediately.

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 listing tool with no annotations and no output schema, the description provides basic purpose but lacks important context about return format, pagination behavior, error handling, and authentication requirements. While the schema covers parameters well, the overall context for proper tool usage remains incomplete.

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 description mentions 'billing account' which aligns with the required 'billingAccountName' parameter, but adds no additional semantic context beyond what the schema already provides. With 100% schema description coverage, the baseline is 3 - the description doesn't compensate for gaps (there are none) but also doesn't add meaningful parameter insights.

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 verb ('List') and resource ('projects associated with a specific Google Cloud billing account'), making the purpose immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'gcp-billing-list-accounts' or 'gcp-billing-get-project-info', which would require more specific scope clarification.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention sibling tools like 'gcp-billing-list-accounts' (for listing billing accounts themselves) or 'gcp-billing-get-project-info' (for detailed project information), nor does it specify prerequisites or appropriate contexts for this listing operation.

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