renewFixedBorrow

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

With no annotations provided, the description carries the full burden. It discloses that the tool renews an existing loan, committing to a new term and interest rate, and that it requires unified account access. The agent hint about user confirmation adds transparency about the binding nature. Missing are details on reversibility or failure modes, but overall good.

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 very concise: a single sentence for purpose, bullet points for rules, and a hint. Every sentence adds value without redundancy. It is front-loaded with the action, making it easy to scan.

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?

Given the lack of output schema, the description covers the essential conditions and user confirmation requirement. It also includes service name. It is complete enough for an agent to execute with caution, but could be improved by mentioning error cases or what happens if conditions are not met.

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 input schema has 0% description coverage, so the description must compensate. It adds meaning to the 'qty' parameter by explaining that if not provided, the full prepayment amount is used, and it conditions the 'loanId' on having allowApplyAmount. However, it does not specify units or format, which would be helpful.

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 'Renew' and the resource 'existing fixed-rate borrow contract', making the purpose unambiguous. It distinguishes itself from siblings by specifying 'fixed-rate borrow contract', which is a specific type among many loan-related 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?

The description provides explicit rules for when to use the tool, such as the contract having prepayment amount available and the renewal amount must be greater than 0. It also includes an agent hint about user confirmation. However, it does not explicitly state when not to use or mention alternative tools, so it lacks exclusion guidance.

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