Darwin-owned Files

io.github.darwin-studios/owned-file-mcpdarwin-studiosstreamable-httpv0.1.0Scanned 1 hour ago

Free offline PDF, XLSX, CSV, ZIP and iCalendar tools. Supplied data; real embedded file bytes.

5 tools: 5 change things.

Reads private data · 0
Reads text others write · 0
Can send data out · 0
3 findings

Anlyon alternative

5 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 →

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.

5 tools

Changes things 5Creates or changes something that can be changed back.Claude Code: ask

csv_to_xlsxConvert exact caller CSV to a real XLSX spreadsheet with one Data sheet and a SUM totals row.1 finding
Why it is in this group
- The description's first verb is "convert": 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 "csv_to_xlsx" 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 description's first verb is "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
Convert exact caller CSV to a real XLSX spreadsheet with one Data sheet and a SUM totals row. Explicit numericColumns and totalColumns; all other cells are literal strings, never inferred formulas. Returns actual file bytes.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
event_brief_to_icsCreate a real iCalendar file from a brief with Start: YYYY-MM-DD HH:MM IANA/Zone, Duration: N minutes, Title: text, optionally preceded by a Markdown heading.1 finding
Why it is in this group
- The description's first verb is "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 "event_brief_to_ics" 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 description's first verb is "create": a word for a change.
  What this check looks for
Description, as the server wrote it
Create a real iCalendar file from a brief with Start: YYYY-MM-DD HH:MM IANA/Zone, Duration: N minutes, Title: text, optionally preceded by a Markdown heading. Resolves timezone to UTC; refuses ambiguous/nonexistent DST times. createdAt must be UTC ISO seconds. Does not add any calendar event.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
markdown_to_pdfRender caller-supplied text Markdown to a real downloadable PDF.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
Render caller-supplied text Markdown to a real downloadable PDF. Headings, paragraphs and lists; Windows-1252 text only. No images, HTML, fetches or external writes. Returns actual inline file bytes and SHA256.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
xlsx_to_csvExtract every sheet from a caller-supplied base64 XLSX into separate genuine UTF-8 CSV files, preserving sheet names in metadata and cell values.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
Extract every sheet from a caller-supplied base64 XLSX into separate genuine UTF-8 CSV files, preserving sheet names in metadata and cell values. Formula values require existing caches; does not execute formulas. Refuses macros, external links and expansion bombs.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
zip_text_filesCreate an exact ZIP of caller-supplied named UTF-8 texts.1 finding
Why it is in this group
- The description's first verb is "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 "zip_text_files" 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 description's first verb is "create": a word for a change.
  What this check looks for
Description, as the server wrote it
Create an exact ZIP of caller-supplied named UTF-8 texts. Preserves bytes and nested safe paths; rejects traversal, duplicate/colliding names and excessive data. No external files or fetches.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- 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.

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 untrusted-input or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0: 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.

3 warn

Warncsv_to_xlsx
The server marks "csv_to_xlsx" 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 description's first verb is "convert": a word for a change.
What this check looks for
Warnzip_text_files
The server marks "zip_text_files" 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 description's first verb is "create": a word for a change.
What this check looks for
Warnevent_brief_to_ics
The server marks "event_brief_to_ics" 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 description's first verb is "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 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http owned-file https://creora.darwin.so/providers/files/mcp

claude mcp add --transport http owned-file https://creora.darwin.so/providers/files/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__owned-file__markdown_to_pdf",
      "mcp__owned-file__csv_to_xlsx",
      "mcp__owned-file__xlsx_to_csv",
      "mcp__owned-file__zip_text_files",
      "mcp__owned-file__event_brief_to_ics"
    ],
    "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 owned-file. Review it before you use it.

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.darwin-studios/owned-file-mcp/verify?hash=da007682da8c0f8439e2d21a2bb4cf00514e2389ad3e72fdfceb0944a9406295" | jq -e '.changed == false'

Pinned hash da007682da8c, from Oct 29, 2026, 06:18 UTC.

Watch

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

https://anlyon.dev/servers/io.github.darwin-studios/owned-file-mcp/changes.xml

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Badge

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Source: MCP Registry. Synced Oct 29, 2026, 06:17 UTC.