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US federal rules taking effect

by joelp22-maker · remote · no sign-in to list tools · v1.0.0 · published by GitHub user joelp22-maker

Which published US federal rules take effect between two dates, and which CFR parts they amend?

Changes · 1
CompareRegistry entry

5 tools: 1 change things and 4 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http referencesource-rules https://referencesource.org/mcp/rules

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnget_rule

    The description contains "every other tool", wording about other tools or servers.

    Matched text

    description: "...rs look like "2026-13685" and appear in every other tool's results."

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

5 tools

Changes things 1Claude Code: ask
  • verify_quoteIs this right?No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Is this right? Check a claim about a final rule — its effective date, its agency, the CFR parts it amends — against the Federal Register record instead of trusting it. Says whether the claim matches a stored value, appears only in the verbatim quote, or differs (and then what the record says instead). Effective dates are exactly where a confident wrong answer costs money.

    Annotations the server declares

    • title: Check a claimed fact about a rule against the register
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
Only reads 4Claude Code: allow
  • get_ruleEverything this register holds for one final rule: title, agency, effective date, the rule's own DATES paragraph, the CFR parts it amends, its publication date, a link to the rule …1 finding

    Why it is in this group

    • The name "get_rule" says "get": a word for reading.

    Findings

    • Warn

      The description contains "every other tool", wording about other tools or servers.

      Matched text

      description: "...rs look like "2026-13685" and appear in every other tool's results."

      What this check looks for
    Description, as the server wrote it
    Everything this register holds for one final rule: title, agency, effective date, the rule's own DATES paragraph, the CFR parts it amends, its publication date, a link to the rule on federalregister.gov, and a verbatim quote of the Federal Register API record it was read from. Document numbers look like "2026-13685" and appear in every other tool's results.

    Annotations the server declares

    • title: Get one rule by Federal Register document number
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • list_agenciesWhich agencies have rules coming?No findings

    Why it is in this group

    • The name "list_agencies" says "list": a word for reading.
    Description, as the server wrote it
    Which agencies have rules coming? Returns each agency in this register with how many rules it has taking effect, the soonest and latest of those dates. Call it to get an agency name exactly as the Federal Register writes it before filtering with list_rules_taking_effect — "Federal Aviation Administration", not "FAA".

    Annotations the server declares

    • title: List the agencies with rules taking effect
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • list_rules_amending_cfr_partIs anything changing in the part of the CFR I am subject to?No findings

    Why it is in this group

    • The name "list_rules_amending_cfr_part" says "list": a word for reading.
    Description, as the server wrote it
    Is anything changing in the part of the CFR I am subject to? Give a CFR title and part — "49 CFR 192", "40 CFR 52", "21 CFR 1308" — and get the already-published final rules that amend it, soonest effective date first, with each rule's DATES paragraph and a verbatim quote. The part is matched whole, so "40 CFR 5" never returns rules about 40 CFR 52.

    Annotations the server declares

    • title: List rules amending a CFR part
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • list_rules_taking_effectWhat lands on me, and when?No findings

    Why it is in this group

    • The name "list_rules_taking_effect" says "list": a word for reading.
    Description, as the server wrote it
    What lands on me, and when? Lists already-published US federal final rules whose effective date falls between two dates, soonest first, optionally from one agency. Each with the rule title, the agency, the CFR parts amended, the document number, the rule's own DATES paragraph and a verbatim quote of the Federal Register record. This is the compliance-calendar question — use it for "what takes effect in Q4", not for searching the Federal Register by topic.

    Annotations the server declares

    • title: List federal rules taking effect between two dates
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http referencesource-rules https://referencesource.org/mcp/rules

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__referencesource-rules__list_rules_taking_effect",
      "mcp__referencesource-rules__get_rule",
      "mcp__referencesource-rules__list_agencies",
      "mcp__referencesource-rules__list_rules_amending_cfr_part"
    ],
    "ask": [
      "mcp__referencesource-rules__verify_quote"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as referencesource-rules. Review it before you use it.