List domains in account

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

Annotations already declare readOnlyHint=true, so the 'Read-only' mention is redundant. However, the description adds useful behavioral context by summarizing what each entry includes (expiry, lock, auto-renew, WhoisGuard, DNS usage), which goes beyond the schema and annotations. No contradictions.

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 concise (3 sentences), front-loaded with the main action, and every sentence adds value: the first states the purpose, the second details list content, and the third provides an alternative and safety note. No wasted words.

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?

With an output schema present, the description need not explain return values. It covers the tool's purpose, output summary, alternative tool, and read-only nature, making it fully context-rich for an agent to select and invoke correctly.

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 description coverage is 100% for all 5 parameters, including defaults and enums. The description mentions paging and filtering generically but does not add semantic meaning beyond what the schema already provides. Baseline 3 is appropriate.

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 tool lists domains in the Namecheap account with paging and filtering, and explicitly differentiates from get_domain_info by noting it provides a full single-domain view. The verb 'List' and resource 'domains' are specific, and the mention of paging/filtering further clarifies scope.

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 explicitly directs users to use get_domain_info for a full single-domain view, providing a clear alternative. It also implies appropriate use cases: listing domains with summaries and applying paging/filtering, which distinguishes it from sibling tools.

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