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

Beyond the annotations, the description discloses the required auth scope and confirms idempotent behavior: if an application already exists, nothing changes and it is returned. It also adds a meaningful privacy guarantee that no name, SSN, or date of birth is held.

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 compact and front-loaded: auth requirement first, then the action, then idempotency and privacy. Every sentence adds useful context without redundant wording.

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 complex 17-parameter write tool with no output schema, the description covers authentication, idempotency, and privacy well but omits parameter guidance and return-value shape. It is adequate on behavior but incomplete for correct invocation of such a parameter-rich tool.

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 does not explain any of the 17 parameters, and schema description coverage is 0%. It only refers generally to a 'loan scenario,' leaving required fields, enums, nested objects, and validation semantics to the schema without added meaning.

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 and resource: 'Start building the shopper's Universal Application from a loan scenario.' It also clarifies the initialization behavior when an application already exists, which distinguishes it from retrieval or update tools.

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?

It states the prerequisite Safe Rate sign-in with scope poppy:write and explains that the tool is used to start an application from a loan scenario. It also clarifies that an existing application is returned unchanged, but it does not explicitly name alternatives such as get_my_application or update_my_application.

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