Corium 21 Skin Tools
io.github.jessejohnsohn/corium21jessejohnsohnstreamable-httpv1.0.0Scanned
Decode skincare ingredient labels (1% line, % ranges, what each does) and get US dry skin forecasts.
3 tools: 2 change things and 1 only read.
- Reads private data · 0
- Reads text others write · 1
- Can send data out · 0
- 1 finding
Anlyon alternative
2 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.
3 tools
Changes things 2Claude Code: ask
decode_ingredient_labelEstimate what's really in a lotion, cream, balm or serum from its printed ingredient list (INCI).1 finding
Why it is in this group
- The name "decode_ingredient_label" says "label": 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 "decode_ingredient_label" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "decode_ingredient_label" says "label": a word for a change.
Description, as the server wrote it Estimate what's really in a lotion, cream, balm or serum from its printed ingredient list (INCI). Finds the likely '1% line' (ingredients above it must be listed by amount under US FDA 21 CFR 701.3 and EU rules), gives a rough percentage range for each ingredient above the line, says what each ingredient does, and adds neutral notes on ingredients people with sensitive or eczema-prone skin often avoid (fragrance, essential oils, some preservatives). Estimates come from label order and typical use levels; they are not lab measurements. Same engine as https://corium21.com/pages/ingredient-label-decoder.
Annotations the server declares
- title: Decode ingredient label
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
dry_skin_forecast7-day dry skin outlook for a US ZIP code or US latitude/longitude.Reads text others writeNo 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.
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 7-day dry skin outlook for a US ZIP code or US latitude/longitude. Estimates how dry indoor air will get once the heat is on (outdoor dew point heated to 70°F), rates each day Low, Moderate, High or Very high, and gives a simple skin-care tip for each level. Uses the US National Weather Service forecast; US locations only. Same method as https://corium21.com/pages/dry-skin-forecast.
Annotations the server declares
- title: Dry skin forecast
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
Only reads 1Show 1 read-only tool
explain_ingredientSay what a single cosmetic ingredient does in a moisturizer (humectant, emollient, occlusive, preservative and so on), its typical use level, common alternative names, and any note…No findings
Why it is in this group
- The name "explain_ingredient" says "explain": a word for reading.
Description, as the server wrote it Say what a single cosmetic ingredient does in a moisturizer (humectant, emollient, occlusive, preservative and so on), its typical use level, common alternative names, and any notes for sensitive skin. Covers 233 common moisturizer ingredients by INCI or common name, and makes a labeled best guess from the name for anything else.
Annotations the server declares
- title: Explain ingredient
- 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 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.
The server marks "decode_ingredient_label" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "decode_ingredient_label" says "label": a word for a change.
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.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http corium21 https://mcp.corium21.com/mcpclaude mcp add --transport http corium21 https://mcp.corium21.com/mcpRun 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.
{
"permissions": {
"allow": [
"mcp__corium21__explain_ingredient"
],
"ask": [
"mcp__corium21__decode_ingredient_label",
"mcp__corium21__dry_skin_forecast"
],
"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 corium21. Review it before you use it.
Capability tags behind 1 rule
- mcp__corium21__dry_skin_forecast 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.jessejohnsohn/corium21/verify?hash=9ab7402da59dfa5fdbe81e07d2387fdb395428456ac24d99d9c689af2d3c2beb" | jq -e '.changed == false'Pinned hash 9ab7402da59d, from Oct 29, 2026, 23:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.github.jessejohnsohn/corium21/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.jessejohnsohn/corium21)Source: MCP Registry. Synced Oct 29, 2026, 23:17 UTC.