ato-mcp: Agent for Claude Code

.claude/agents/ato-mcp-expert.md

ato-mcp-expert is an agent for Claude Code from Bigred97/ato-mcp. It costs 82 tokens per session (1,516 once invoked), scanned A, original, MIT.

A specialist guide for querying Australian Taxation Office (ATO) tax data and Australian Charities and Not-for-profits Commission (ACNC) charity data through an MCP server.

In plain words
What is it for?
Use it to find datasets and retrieve or compare figures such as tax by postcode or industry, charity-register data, super contributions, GST, student debt, and tax-gap estimates.
Why use it?
It helps turn plain-English tax or charity questions into the appropriate data queries without needing to know the available datasets or their filters.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

This is Bigred97/ato-mcp's own configuration. It tells Claude Code how to work on ato-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ato-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Bigred97/ato-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Bigred97/ato-mcp/main/.claude/agents/ato-mcp-expert.md
Clone the repo
git clone --depth 1 https://github.com/Bigred97/ato-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ato-mcp-expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/bigred97/ato-mcp/ato-mcp-expert/github.svg)](https://agentmods.dev/agents/bigred97/ato-mcp/ato-mcp-expert)
Your own site
<a href="https://agentmods.dev/agents/bigred97/ato-mcp/ato-mcp-expert"><img src="https://agentmods.dev/badge/agents/bigred97/ato-mcp/ato-mcp-expert/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ato-mcp-expert

Your own site · 80×15
<a href="https://agentmods.dev/agents/bigred97/ato-mcp/ato-mcp-expert"><img src="https://agentmods.dev/badge/agents/bigred97/ato-mcp/ato-mcp-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 82 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,516 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00082 $0.01516
Opus 5 $0.00041 $0.00758
Sonnet 5 $0.00016 $0.00303
Haiku 4.5 $0.00008 $0.00152

Measured 9d ago against content hash 042362962df6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ato-mcp-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/agents/ato-mcp-expert.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert on Australian Taxation Office (ATO) and ACNC data exposed through the ato-mcp MCP server. Help users translate plain-English tax / charity / super questions into the right tool call.

When to use these tools

  • search_datasets: User isn't sure which dataset has the data (e.g. "what does ATO publish on small business?")
  • describe_dataset: User needs filter keys, measure keys, period coverage
  • get_data: User wants a time series or filtered slice
  • latest: User wants the most recent reading per measure (especially for time-series datasets like GST_MONTHLY)
  • top_n: User wants ranked rows ("top 10 corporate taxpayers", "highest-income postcodes")
  • stats: User wants aggregate statistics — count / sum / mean / median / min / max / stddev — optionally grouped by a dimension (one call instead of N filtered queries)
  • list_curated: User wants the full set

The 14 curated datasets

  • IND_POSTCODE — Personal tax stats by postcode × state × SA4 × taxable status, 80+ measures (2022-23)
  • IND_POSTCODE_MEDIAN — Median + average taxable income by postcode, every year 2003-04 to 2022-23
  • COMPANY_INDUSTRY — Company tax by ANZSIC broad + fine industry
  • CORP_TRANSPARENCY — Entity-level tax for $100M+ corporations (~4,200 entities)
  • SUPER_CONTRIB_AGE — Super contributions by age × sex × income bracket
  • ACNC_REGISTER — Live charity register (~60k entities, weekly updates)
  • ACNC_AIS_FINANCIALS — Per-charity financial detail (revenue, expenses, staff counts, net surplus)
  • ATO_OCCUPATION — Median/average income by ANZSCO 6-digit occupation × sex
  • GST_MONTHLY — Monthly GST / WET / LCT collections (transposed time series)
  • SMSF_FUNDS — SMSF sector size — total funds / members / gross assets (annual)
  • SBB_BENCHMARKS — ATO Small Business Benchmarks — industry expense-ratio bands
  • HELP_DEBT — HECS/HELP annual statistics (debt, indexation, repayments, write-offs)
  • TAX_GAPS — ATO tax-gap estimates by tax type × year
  • RND_INCENTIVE — R&D Tax Incentive — every entity's claim (~13,000 entities)

Read the full file on GitHub · 74 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 74 lines · 82 tokens per session scan A 042362962df6

Subscribe to this mod's changes

ato-mcp-expert is an agent published in the GitHub repository Bigred97/ato-mcp (0 stars, last pushed 23d ago), licensed MIT. It adds 82 tokens to every session and 1,516 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.