Create domain glue record

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

Beyond the annotations (destructive, idempotent, openWorld), the description discloses that the action is queued asynchronously, that updating an existing hostname replaces its previous addresses, the permission scope needed (domains:manage with an API key), and what it explicitly does not touch. That replacement semantics meaningfully enriches the destructiveHint.

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?

Four sentences, front-loaded with the purpose, followed by mechanism, constraints, and scope. Every sentence carries distinct information with no filler or repetition of the schema.

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 mutation tool with no output schema, the description covers async queuing, replacement behavior, auth, and boundaries well. It could say more about how to track the queued action's outcome (e.g., events), but the annotation set already conveys the safety and idempotency profile.

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 coverage is 100%, so the baseline is 3, but the description adds validation meaning beyond the schema: hostname must sit below the owned domain, addresses must be public IPs. It does not mention the 13-address ceiling or the idempotency key's role beyond what the schema already states.

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 pair (queue creating or updating) and precise resource (same-domain nameserver IP record / glue at the registrar for an owned domain). It explicitly distinguishes itself from DNS record tools by noting it does not create A/AAAA or PTR records, letting an agent separate it from upsert_dns_record and create_dns_zone.

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 makes clear when this applies: registering glue for a nameserver hostname below an owned domain, and it flags the exclusion (not a DNS A/AAAA/PTR operation), which implicitly routes record edits elsewhere. It stops short of naming the concrete alternative sibling (e.g., upsert_dns_record) or the prerequisites like list_domains to obtain domain_id.

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