checkTransferAvailability

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

With no annotations, the description carries the full behavioral disclosure burden. It signals that this is a non-mutating check rather than an actual transfer, which is useful, but it does not describe the result format, per-domain reporting, failure behavior, or rate limits.

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 a single, direct, front-loaded sentence with no filler. The API-reference link is the only additional element and is plausibly useful rather than distracting.

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 fully documented parameter, so invocation requirements are clear. However, with no annotations and no output schema, the description leaves the response shape and per-domain availability semantics implicit, so it is adequate but not fully 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?

The input schema already fully documents the only parameter, including accepted formats (comma-separated string or array) and the 200-domain maximum. The description adds no new parametric meaning beyond duplicating 'up to 200'.

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 names a specific operation ('check whether') and resource ('domains can be transferred into the account'), and explicitly scopes it to up to 200 domains. This clearly distinguishes it from checkRegisterAvailability (registration availability) and transferDomain (initiating a transfer).

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 clearly frames the intended use case: determining whether domains are eligible for transfer into the account before performing a transfer. It does not explicitly name alternatives or when-not-to-use cases, but the context is unambiguous and the sibling list reinforces the distinction.

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