re_rent_rental

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

With no annotations provided, the description carries the behavioral burden. It discloses key traits: only works on expired rentals, requires re_rent_available=true, re-uses the original duration, and uses the current price. It does not mention side effects like whether a new rental ID is created, but the core behavior is transparent.

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?

Three concise sentences. The first states the action, the second gives the precondition, and the third clarifies the duration behavior. No filler or redundancy; every sentence earns its place.

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 has one parameter, no output schema, and no annotations. The description covers the essential context: what it does, when it works, and what not to pass. It stops short of describing the return value or result details, but for a simple action tool this is acceptable, though it could be slightly more complete.

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 100% with rental_id already described as 'ren_xxx from an expired LTR with re_rent_available=true.' The description adds value by explaining why only one parameter is needed ('no duration argument') and clarifying the re-rent concept, which complements the schema rather than repeating it.

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 opens with a specific verb+resource: 'Re-rent the same number for another period at the current price.' It clearly distinguishes from sibling tools like rent_number (new rental) and reuse_number by focusing on an expired rental with re_rent_available=true.

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 when-to-use conditions: only for an expired rental with re_rent_available=true and the provider has not released the number. It also states 'no duration argument' to clarify what not to pass. However, it does not explicitly name alternative tools for different scenarios.

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