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Just Domain

by ai.justdomain
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Check whether a domain can transfer to Just Domain

check_domain_transfer
Read-only

Read-only transfer precheck for ONE domain the user already owns at another registrar: could it move to Just Domain, what is stopping it, what would it cost, and does its DNS survive the move. Nothing is ordered, charged, unlocked, or changed. The answer is built from two public sources only, the registry's own RDAP record and our registrar's price list, so it is safe to call without authentication and it reads nothing about the user's account. Read blockers before you say anything: an EMPTY list is the only thing that means the domain is ready to move. Every entry carries a plain detail sentence you can show as-is, and a code you do not recognise must still be reported through its detail rather than dropped. source.rdap: false means the registry did not answer, so nothing about the domain was established: say that, and never call it ready. price is the TOTAL for one full transfer term, not a per-year rate. A .ai transfer adds and charges TWO years because its registry works in two-year units. Do not divide or multiply the amount by a number of years, and do not label it per year; quote term_note beside it. expected_new_expiry is a projection (the registry's current expiry plus the term), not a date any registry has confirmed, so present it as expected. Moving a domain IN is self-service: the owner checks it and pays at https://justdomain.ai/transfer, pasting the authorization code there, and a transfer that does not complete is refunded in full. This tool tells the user whether the domain is eligible to move and what one full term would cost; hand over transfer_url, which opens that page for this domain in the owner's browser. Nothing is paid or ordered inside the chat. Moving a domain OUT of Just Domain IS self-service, and that means a human owner signed in on justdomain.ai in a browser, switching the transfer lock off and issuing the code from their own account. It does not mean you can do it. This tool does not return, accept, or hint at an authorization (EPP) code, and there is no agent path to unlocking a domain or to having a code issued, here or through any other Just Domain surface. An auth code is a bearer credential for the domain and a chat transcript is not a place to put one. Do not ask the user for a code, do not offer to hold or relay one, and never claim you can unlock or move the domain yourself.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
domainYesOne fully-qualified domain the user already owns somewhere else, including its TLD (e.g. 'acme.com'). Not a bare label and not a list: this reads a third-party registry per call.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
tldYes
priceNoNull when the registrar's price list could not be read. Never estimate a domain transfer price yourself.
readyYesTRUE only when `blockers` is empty. It is a convenience over that list and can never disagree with it: anything we could not establish becomes a blocker, so a registry timeout reads as not ready rather than as a green light.
domainYes
sourceYesWhich public sources actually answered on this request.
blockersNoWhat stands between this domain and a transfer, most blocking first. An EMPTY list is the only thing that means ready.
next_stepYesOne sentence you can say to the user about what happens next, already matched to this domain's state.
registrarYesWho sponsors the domain today, as the REGISTRY reports it.
supportedYesWhether Just Domain can accept this ENDING at all. Says nothing about this particular domain - read `blockers` for that.
checked_atYesISO-8601 instant these facts were read.
nameserversNo
transfer_urlYesThe page on justdomain.ai a PERSON opens in a browser to take this further. The handoff out of the chat.
dns_continuityYesDoes the domain's DNS keep working after the move? A transfer moves sponsorship, not DNS, so the current delegation decides whether the site and the mail survive it.
auth_code_policyYesConstant. The rule about authorization (EPP) codes, restated in the payload so it travels with the answer. Follow it.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A4.4/5.0
Behavior5/5

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

Beyond the readOnlyHint and destructiveHint annotations, the description adds extensive behavioral context: nothing is ordered, charged, unlocked, or changed; it reads only public registry/price sources; it has no authentication needs; it never returns or accepts auth codes; and it explains the .ai two-year term and refund policy. This is exactly the kind of safety-critical behavior annotations alone do not convey.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is long, but it is deliberately structured and front-loaded: purpose, then blockers, pricing semantics, transfer workflow, and auth-code warnings. Each section carries operational or safety value, so it is dense rather than padded, though a bit longer than strictly minimal.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the safety-sensitive transfer context, the description leaves almost nothing to inference: call prerequisites, blocker interpretation, source.rdap failure handling, total pricing semantics, expiry projection caveats, self-service URL handoff, refunds, and explicit anti-patterns around EPP codes. It is complete even without relying on the output schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3; the schema already documents the single domain parameter including constraints and an example. The description reinforces 'ONE domain' and 'already owns at another registrar' but adds little new meaning beyond what the schema already provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb and resource: 'Read-only transfer precheck for ONE domain the user already owns at another registrar' and enumerates exactly what the tool answers: eligibility, blockers, cost, and DNS survival. It is immediately distinguishable from the sibling search_domains by its transfer-specific scope.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It clearly establishes when to call the tool: for a single domain the user already owns elsewhere, and it explicitly states this is a read-only precheck that orders/charges/changes nothing. It does not explicitly name search_domains as an alternative or give an exclusion condition, but the transfer-vs-search purpose is unambiguous.

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

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