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

The annotations are thin (openWorldHint and destructiveHint only), so the description carries most of the behavioral disclosure. It adds a valuable business rule about refusing a second undecided application and explains the data source behavior for warm versus cold paths. However, it does not disclose what is persisted, whether side effects occur immediately, or any permission requirements. There is no contradiction with the destructiveHint=false annotation.

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 three short sentences with no filler. It front-loads the purpose, then adds the critical uniqueness constraint, then explains the path parameter compactly. Every sentence contributes operational information an agent needs.

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 description covers the core starting semantics and the main path distinction, and an output schema exists to document return values. However, it leaves an agent guessing about the correct combination of parameters, especially whether formationId is required for WARM_FORMATION, and it could usefully reference checking for an existing undecided application before calling.

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 coverage is 67% and the ID parameters are only documented as 'UUID value wrapper', so the description is needed to add real meaning. It does explain both enum values of the path parameter in useful terms, but it never explains the semantic role of companyId or formationId, and notably does not say that formationId is tied to the WARM_FORMATION path.

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 states a specific action ('opens a business account application') and identifies the resource (a company's business account application). It also differentiates this from the many sibling banking/application tools by framing it as the starting operation and by naming the unique one-undecided-application constraint.

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 gives clear conditional guidance for choosing the path parameter: WARM_FORMATION when the company was formed with Lovie and data can be carried over, COLD_MANUAL when the applicant enters answers manually. It also warns that starting a second undecided application is refused, though it does not explicitly point to alternatives such as banking_update_banking_application for existing applications.

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