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

Annotations already declare destructiveHint=true, idempotentHint=true, and openWorldHint=true, so safety/behavioral profile is covered. The description adds the concrete effect of removal, which is useful, but the slug precondition merely restates the schema rather than adding new behavioral context (permissions, irreversibility, re-adding).

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 tightly written sentences with the effect front-loaded. The 'Inputs: domain, optional slug, and token' clause partially repeats the schema, which is minor waste but not harmful.

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 destructive mutation with no output schema, the description conveys the effect but omits permission/auth requirements beyond the token, whether removal is reversible, and what happens on failure. Annotations carry the safety profile, so the gap is moderate rather than severe.

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%, so the schema already documents domain, slug, and token. The description's slug conditionality duplicates the schema text and adds no new syntax or format detail, making baseline 3 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?

States a specific verb (removes) and resource (hostname/domain) and even describes the effect: 'requests to that host no longer serve the site.' This distinguishes it from add_domain, but it never names or contrasts with a sibling explicitly.

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?

No explicit when-to-use or when-not-to-use guidance and no mention of alternatives (add_domain, domain_status, list_domains). The slug precondition is stated, but that is a requirement, not usage guidance.

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