List Billing Account Projects

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

No annotations are provided, so the description carries the disclosure burden. It signals a read-only listing operation and the billing-account scoping, but it does not disclose that 'all' projects may require pagination via pageToken, nor does it describe the response shape or any permission requirements.

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 that states the core operation and scope with no filler or redundant phrasing. Every word contributes to understanding what the tool does.

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 list tool with no output schema, this description covers the core selection and invocation intent. However, it omits important operational context such as pagination behavior needed to truly retrieve 'all' projects, and it does not clarify what fields the returned projects contain.

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?

Schema description coverage is 100%, so the schema already documents billingAccountName, pageSize, and pageToken. The description adds no parameter-specific semantics beyond identifying the billing account as the filter, which is appropriate given the schema's completeness.

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 uses a specific verb ('List') and resource ('projects'), with a clear scope ('associated with a specific Google Cloud billing account'). This clearly distinguishes it from sibling tools like gcp-billing-list-accounts, which lists billing accounts rather than projects.

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 use case is implied: use this tool when you need the projects linked to a given billing account. However, it does not explicitly state when not to use it or which sibling tool might be preferred for related tasks, such as getting billing account details or listing services.

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