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

Annotations already declare destructive=true, idempotent=false, openWorld=true, so the safety profile is partly covered. The description adds genuinely new context: production traffic impact and a hard precondition of exact user approval via BEON PASS. It omits what happens to existing domains or whether DNS verification is required, keeping it from a 5.

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 compact clauses, front-loaded with the action and followed by the two highest-value warnings. Nothing is padded, though the terseness leaves the parameter story entirely unaddressed for a 10-param tool.

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, non-idempotent, open-world mutation with 10 undocumented parameters and no output schema, the description covers only the safety warning. An agent still lacks the parameter contract and post-attach behavior (DNS verification, propagation) needed to call this 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 0% across 10 parameters, so the description carries the full burden and largely fails it. It names only the implicit project/domain concepts and never explains team_id, the beon_* plumbing, or how the referenced approval maps to the approval_id parameter.

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+resource ("Attach a domain to a project") that an agent can act on immediately. It does not explicitly distinguish itself from close siblings such as vercel_remove_project_domain or vercel_verify_project_domain, so it stops 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?

"Can affect production traffic" and the approval precondition imply when this tool is appropriate, but no alternative is named and there is no explicit when-not guidance (e.g., verify the domain first, or use remove_project_domain to detach). Usage is inferable rather than stated.

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