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

The description does not disclose how the tool handles the many other parameters in the schema, nor does it mention any side effects, permissions, or discard behavior. The annotation set is empty, so the description bears full responsibility but falls short.

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, concise sentence with no fluff or redundancy.

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 tool has many parameters and no output schema, the description is incomplete. It explains only the core splitting function and leaves the role of other parameters unexplained.

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 only mentions hostname, while the schema includes nine parameters. It does not clarify which parameter is used for the split operation or what happens to the others, adding no value beyond the schema descriptions.

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 a specific action (split) and resource (hostname), and includes a qualifier that it does not fetch WHOIS or data, making the purpose unambiguous.

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 no explicit guidance on when to use this tool versus alternatives. The phrase 'without WHOIS or data' hints at a distinction but does not name alternative tools or conditions.

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