One U Education

Get postcode regional classification and schools

get_postcode

Read-onlyIdempotent

Get every locality/state for one Australian postcode, its regional category (Category 2 or Category 3, or null for non-regional) and associated schools. School addresses match the postcode text and are deduplicated by school code; they are not ranked by distance and may include closed campuses. Regional classification does not determine personal visa eligibility. This public endpoint returns English natural-language text, preserving sources, conditions and pagination.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "postcode": "<postcode>"
    },
    "name": "get_postcode"
  }
}

Input Schema

Name	Required	Description	Default
`locale`	No	Language of names/descriptions in the result: zh-CN (default, Simplified Chinese plus English names), en-US, zh-TW. Also selects the language prefix of returned oneuedu.com URLs.	zh-CN
`postcode`	Yes	Exactly four digits as a string, including leading zeroes. Use a postcode returned by search_postcodes.

Schema Changelog

Changes observed during successful MCP inspections.

AddedOct 12, 2026

TDQS

A3.9/5.0

Behavior5/5

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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, open-world), yet the description still adds real behavioral detail: schools are matched by postcode text, deduplicated by school code, unranked by distance, and may include closed campuses. It also discloses the response form (English natural-language text, sources and conditions preserved, pagination present) and a scope limit on the classification.

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?

Three sentences, front-loaded with the core purpose, then deduplication semantics, then response format. Every sentence carries usable information, though the density makes it slightly heavy for a two-parameter lookup.

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

Completeness4/5

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

With no output schema, the description carries the return-value burden and does so reasonably well (content type, deduplication, pagination, caveats). Minor gaps remain: it never states what the 'Category 2/Category 3' values mean or whether results can be empty for a valid postcode.

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 description coverage is 100% and both parameters (postcode pattern, locale enum with default) are fully documented in the schema. The description adds no syntax, format, or default information beyond that, so the baseline 3 applies.

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

Purpose4/5

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

States a specific verb and resource (get localities/state, regional category, and schools for one Australian postcode) with explicit scope. It is clearly distinguishable from the bulk search sibling by its single-postcode scope, but it never names an alternative tool, so it falls short of full sibling differentiation.

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

Usage Guidelines3/5

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

Usage is only implied: the tool is a per-postcode lookup, and the schema (not the description) tells the agent to feed it a postcode from search_postcodes. The description offers interpretation caveats (not distance-ranked, may include closed campuses, classification is not visa eligibility) but no explicit when-to-use or when-to-prefer-another-tool guidance.

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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