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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is fully covered structurally. The description adds only the underlying GET endpoint, which gives a small amount of behavioral context (it is a plain read) but no pagination, rate-limit, or auth detail.

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?

Two tight sentences with zero waste; the resource scope and returned fields are front-loaded, and the endpoint is appended as compact reference material.

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?

For a simple read-only listing tool with one documented parameter and no output schema, the description plus annotations supply enough to call it correctly, and it pre-announces the return fields. Only minor elements like result ordering or volume are unaddressed.

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?

With a single parameter at 100% schema description coverage, the schema already explains environment_id and where to source it. The description adds no parameter syntax or format detail, so the baseline 3 applies.

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 states a specific resource (domains attached to one environment) and even enumerates the returned fields (id, name, DNS/Cloudflare usage), so the agent knows exactly what comes back. It does not explicitly name the sibling it differs from, e.g. kinsta_list_company_domains, so it falls short of a 5.

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?

Usage is only implied: the single required environment_id makes the context clear, and the schema points to kinsta_list_sites/kinsta_list_site_environments for obtaining the id. There is no explicit when-to-use or when-not-to-use guidance relative to kinsta_list_company_domains.

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