domain_list

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered structurally. The description adds nothing beyond that — no note on whether results are paginated, cached, or include suspended domains. With annotations carrying the load, the description's lack of any extra behavioral context keeps this low.

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?

A single short sentence with no wasted words, delivering the core scope up front. It is terse to the point of being minimal, but nothing is padded or redundant.

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?

An output schema exists, so return-value details are not the description's responsibility, and a no-parameter read-only list is intrinsically simple. Still, the complete absence of usage context or sibling differentiation leaves a gap for a tool sitting among many similarly named domain operations.

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 tool takes zero parameters, so there is nothing for the description to clarify and the baseline is 4. Schema coverage is 100% on an empty object, which matches the description's implication that no filtering input is accepted.

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?

States the resource ('all domains') and the scope ('linked to the account'), so an agent knows this returns the account's domain list without any parameters. However, it does not distinguish itself from close siblings such as domain_zones, domain_subdomains, or domain_check_to_register, which an agent could easily confuse with a plain domain listing.

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?

There is no when-to-use guidance, no mention of alternatives, and no indication of when this is preferable to domain_zones or domain_subdomains. The agent must infer usage entirely from the name and from sibling naming.

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