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Flashcards by Fulin Labs

io.github.aeither/flashcardsaeitherstreamable-httpv6.7.0Scanned

Learn vocabulary from daily life with flashcards, examples, pronunciation and shareable study links.

3 tools: 3 change things.

Tools: 0 delete, 0 irreversible, 3 write, 0 read.
  • Reads private data · 0
  • Reads text others write · 1
  • Can send data out · 0
  • 1 finding

Anlyon alternative

3 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →
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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

3 tools

Changes things 3Claude Code: ask
  • create_flashcard_deckUse this when the user asks to learn, study, memorize, review, practice, or create flashcards about any topic.1 finding

    Why it is in this group

    • The name "create_flashcard_deck" says "create": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "create_flashcard_deck" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "create_flashcard_deck" says "create": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Use this when the user asks to learn, study, memorize, review, practice, or create flashcards about any topic. Generate the complete deck in this call and open it in the interactive flashcard UI. Act immediately using the existing conversation and source material; infer language and backLanguage yourself. Never ask the user for language codes, tool arguments, or confirmation of an already requested deck. For a request for 50 cards, submit all 50 completed cards in one call. Keep the response brief and let the study UI show the deck. Examples include 'I want to learn about X', 'teach me X with flashcards', and 'Create an HSK3 vocabulary deck about restaurants'. Do not call a separate add-card tool. Do NOT use when the user asks for a direct explanation without study intent, asks to delete or modify an existing deck, or requests an in-conversation quiz without creating a deck.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false
    • idempotentHint: true
  • create_website_deckUse this when the user explicitly asks to save or share a deck on the website, or chooses Learn on website in the study widget.Reads text others writeNo findings

    Why it is in this group

    • The name "create_website_deck" says "create": a word for a change.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Use this when the user explicitly asks to save or share a deck on the website, or chooses Learn on website in the study widget. It sends the supplied deck to Fulin Labs and creates a persistent shareable deck link. Anyone with the link can read the deck. Do not call merely to preview or study a deck. Repeating the call may create another deck.

    Annotations the server declares

    • readOnlyHint: false
    • openWorldHint: true
    • destructiveHint: false
    • idempotentHint: false
  • speak_textUse this when the flashcard widget requests speech audio for the current card.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
    Use this when the flashcard widget requests speech audio for the current card.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false
    • idempotentHint: true

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.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncreate_flashcard_deck

    The server marks "create_flashcard_deck" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "create_flashcard_deck" says "create": a word for a change.

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 6.7.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http flashcards https://flashcard.fulinlabs.com/api/mcp
claude mcp add --transport http flashcards https://flashcard.fulinlabs.com/api/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__flashcards__create_flashcard_deck",
      "mcp__flashcards__speak_text",
      "mcp__flashcards__create_website_deck"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as flashcards. Review it before you use it.

Capability tags behind 1 rule
  • mcp__flashcards__create_website_deck untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.aeither/flashcards/verify?hash=66a21a4477ace5f84f17d9592aa9d461f05e5dd299f0af5d6a5edb786e9c91e8" | jq -e '.changed == false'

Pinned hash 66a21a4477ac, from Nov 2, 2026, 07:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.aeither/flashcards/changes.xml

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Badge

anlyon.dev badge for io.github.aeither/flashcards
[![anlyon.dev](https://anlyon.dev/badge/io.github.aeither/flashcards.svg)](https://anlyon.dev/servers/io.github.aeither/flashcards)

Source: MCP Registry · repository. Synced Nov 2, 2026, 07:17 UTC.