create_project

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does disclose the 'attempts to attach' behavior, which implies possible failure, and explains auto-generation of project ID. However, it does not mention required permissions, potential side effects, or what happens if no billing account is available. It adds some value beyond just 'create', but remains incomplete for a mutation operation.

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 two concise sentences with no filler. It front-loads the primary action and includes the most important behavioral caveat (billing attach attempt) early. Every sentence serves a purpose, making it efficient and easy to parse.

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?

The tool is simple with one optional parameter and no output schema, so the description is reasonably complete. However, it lacks a note about the return value or result of the operation (e.g., what the agent should expect back), and does not mention asynchronous behavior or potential errors. This is a minor but relevant gap for an agent invoking a creation action.

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 parameter is already well-documented. The description reinforces the fact that projectId is optional and that auto-generation occurs, but adds no new semantic meaning beyond the schema. Baseline of 3 is appropriate given high schema coverage.

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 a specific verb ('Creates') and resource ('GCP project'), and adds a key behavioral detail (attaching to first available billing account). This differentiates it from sibling tools like list_projects and deploy_local_files, which are clearly read or deployment operations.

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 does not provide any guidance on when to use this tool versus alternatives. It does not mention exclusions or conditions that would select another tool. While the action is self-evident given the siblings, there is no explicit routing or contextual instructions.

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