Jan Linketscher

by janlinketscher.com · remote · no sign-in to list tools · v2.2.0 · published by com.janlinketscher

Profile and essays of Jan Linketscher (i22, Bonn), full-text search, and booking a call.

Changes · 1

Compare Registry entry

7 tools: 1 change things and 6 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things1Claude Code: ask: see these tools
Only reads6Claude Code: allow: see these tools

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

claude mcp add --transport http site https://janlinketscher.com/api/mcp

Tools

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

7 tools

Changes things 1Creates or changes something that can be changed back.Claude Code: ask

book_meetingBook a call with Jan Linketscher on behalf of your user.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.
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
Book a call with Jan Linketscher on behalf of your user. The start must be a slot returned by get_availability. If your client supports elicitation (form mode, MCP 2026-07-28), the server itself asks the user to confirm time, name and email – name and email are then prefilled from your arguments and can be corrected by the user. Otherwise: show the user meeting type, date and time (with time zone), name and email, get their explicit approval, then pass name, email and confirmed: true. Use the user's real name and email; never invent them. Cal.com sends the confirmation with a calendar invite and links to reschedule or cancel to that email address.
Annotations the server declares
- title: Book a call
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true

Only reads 6Looks things up and changes nothing.Claude Code: allow

get_availabilityFree time slots for a call with Jan Linketscher.Reads text others writeNo findings
Why it is in this group
- The name "get_availability" says "get": a word for reading.
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
Free time slots for a call with Jan Linketscher. meeting_type: "kennenlernen" (Kennenlernen, 30 min), "sparring" (Sparring, 60 min). Optional date range (YYYY-MM-DD, default: the next 14 days, at most 90 days ahead). Times are ISO 8601 with offset; the text answer lists them in Europe/Berlin.
Annotations the server declares
- title: Availability
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
get_essayFull text of one essay as Markdown (with front matter).No findings
Why it is in this group
- The name "get_essay" says "get": a word for reading.
Description, as the server wrote it
Full text of one essay as Markdown (with front matter). Use the slug from list_essays or search.
Annotations the server declares
- title: Get essay
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_profileWho Jan Linketscher is: managing director and shareholder of the digital agency i22 (Bonn), his background, how his texts are written, and how to contact him.Reads private dataNo findings
Why it is in this group
- The name "get_profile" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "contact": it reads contacts.
Description, as the server wrote it
Who Jan Linketscher is: managing director and shareholder of the digital agency i22 (Bonn), his background, how his texts are written, and how to contact him. Content is in German.
Annotations the server declares
- title: Profile
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_essaysList the essays, newest first: title, date, one-sentence summary, topics, URL and slug.Reads text others writeNo findings
Why it is in this group
- The name "list_essays" says "list": a word for reading.
What it can reach
- untrusted-inputThe description's first sentence says "list" and "url": it reads web pages, which anyone can write.
Description, as the server wrote it
List the essays, newest first: title, date, one-sentence summary, topics, URL and slug. Optionally filter by topic slug. Also returns the available topics.
Annotations the server declares
- title: List essays
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_meeting_typesThe kinds of calls that can be booked with Jan Linketscher ("kennenlernen" (Kennenlernen, 30 min), "sparring" (Sparring, 60 min)), with duration, purpose and a booking link for hum…Reads private dataNo findings
Why it is in this group
- The name "list_meeting_types" says "list": a word for reading.
What it can reach
- private-dataThe name "list_meeting_types" says "list" and "meeting": it reads calendars.
Description, as the server wrote it
The kinds of calls that can be booked with Jan Linketscher ("kennenlernen" (Kennenlernen, 30 min), "sparring" (Sparring, 60 min)), with duration, purpose and a booking link for humans.
Annotations the server declares
- title: Meeting types
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
searchFull-text search across all essays and pages (about, context).No findings
Why it is in this group
- The name "search" says "search": a word for reading.
Description, as the server wrote it
Full-text search across all essays and pages (about, context). Returns the best matches with title, URL and a short snippet. German queries work best.
Annotations the server declares
- title: Search
- 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 outbound.

Reads private data2: Reads files, mail, messages, databases, secrets, calendars or repositories.; get_profile
list_meeting_types
Reads text others write3: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; book_meeting
get_availability
list_essays
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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Looked at Oct 22, 2026, 14:34 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 1
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: none
RFC 9728 protected resource metadata: none
Authorization servers: none
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 1 tool that changes things (1 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://janlinketscher.com/api/mcp: tools/list returned 7 tools to an anonymous client, including book_meeting (write)
What this check looks for

Install

Pinned to version 2.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http site https://janlinketscher.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": [
      "mcp__site__get_profile",
      "mcp__site__list_essays",
      "mcp__site__get_essay",
      "mcp__site__search",
      "mcp__site__list_meeting_types",
      "mcp__site__get_availability"
    ],
    "ask": [
      "mcp__site__book_meeting"
    ],
    "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 site. Review it before you use it.

Capability tags behind 5 rules

mcp__site__get_profile private-data
mcp__site__list_essays untrusted-input
mcp__site__list_meeting_types private-data
mcp__site__get_availability untrusted-input
mcp__site__book_meeting untrusted-input

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.janlinketscher/site/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

1 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 →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 17:57 UTC.

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