Moving Polygons

com.movingpolygons/mapsmovingpolygons.comstreamable-httpv1.0.0Scanned 48 minutes ago

Create, edit and publish animated historical maps in your Moving Polygons account.

11 tools: 1 can delete or cancel things, 1 do something that can't be undone, 3 change things and 6 only read.

Reads private data · 0
Reads text others write · 2
Can send data out · 2
1 finding

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.

11 tools

Deletes or cancels 1Removes, cancels or revokes something.Claude Code: deny

replace_map_contentOverwrite an existing map's layers, markers, name, description and casualty bar (and style, if given) with an import JSON (up to ~1 MB; else create_upload_link with mode replace).No findings
Why it is in this group
- The name "replace_map_content" says "replace": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Overwrite an existing map's layers, markers, name, description and casualty bar (and style, if given) with an import JSON (up to ~1 MB; else create_upload_link with mode replace). The link and publish state stay; the old content is backed up.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: true

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

publish_mapMake one of the user's maps public at its /map/<handle>/<slug> link.Reads text others writeCan send data outNo findings
Why it is in this group
- The name "publish_map" says "publish": a word for a change that another call does not undo.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe name "publish_map" says "publish": it sends or publishes something to other people.
Description, as the server wrote it
Make one of the user's maps public at its /map/<handle>/<slug> link. Only call this when the user explicitly asked to publish.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- openWorldHint: true

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

create_mapCreate a new private draft map from an import JSON (up to ~1 MB).No findings
Why it is in this group
- The name "create_map" says "create": a word for a change.
Description, as the server wrote it
Create a new private draft map from an import JSON (up to ~1 MB). For bigger maps or files on disk use create_upload_link instead.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
create_upload_linkA one-off link (valid 15 minutes) to upload a map JSON file with curl: creates a new draft map, or (mode replace) replaces an existing map's content.1 finding
Why it is in this group
- The name "create_upload_link" 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_upload_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true}; The name "create_upload_link" says "create": a word for a change.
  What this check looks for
Description, as the server wrote it
A one-off link (valid 15 minutes) to upload a map JSON file with curl: creates a new draft map, or (mode replace) replaces an existing map's content. Use this for maps over ~1 MB or files on disk. The curl output reports the result.
Annotations the server declares
- readOnlyHint: true
unpublish_mapMake one of the user's maps private again (its public link stops working).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.
Description, as the server wrote it
Make one of the user's maps private again (its public link stops working).
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false

Only reads 6Looks things up and changes nothing.Show 6 read-only tools

get_accountThe signed-in user's public handle, plan and how many maps they can still create.No findings
Why it is in this group
- The name "get_account" says "get": a word for reading.
Description, as the server wrote it
The signed-in user's public handle, plan and how many maps they can still create.
Annotations the server declares
- readOnlyHint: true
get_import_formatThe JSON format for maps (layers with timed polygon keyframes, markers, style).No findings
Why it is in this group
- The name "get_import_format" says "get": a word for reading.
Description, as the server wrote it
The JSON format for maps (layers with timed polygon keyframes, markers, style). Read it before building a map.
Annotations the server declares
- readOnlyHint: true
get_mapA summary of one of the user's maps (layers, keyframe dates, markers) and a download link for its full import JSON (fetch it with curl; it can be several MB).No findings
Why it is in this group
- The name "get_map" says "get": a word for reading.
Description, as the server wrote it
A summary of one of the user's maps (layers, keyframe dates, markers) and a download link for its full import JSON (fetch it with curl; it can be several MB).
Annotations the server declares
- readOnlyHint: true
get_public_mapOne published map as Markdown: description and sources, the timeline of keyframes (date and caption), layers, events, and the iframe code to embed the interactive map.Reads text others writeCan send data outNo findings
Why it is in this group
- The name "get_public_map" says "get": a word for reading.
What it can reach
- untrusted-inputThe input takes a URL (input.url), and the tool reads it: it reads web pages, which anyone can write.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Claude Code: ask, because it is tagged outbound.
Description, as the server wrote it
One published map as Markdown: description and sources, the timeline of keyframes (date and caption), layers, events, and the iframe code to embed the interactive map. Pass its URL, or the handle and slug.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_mapsThe user's maps, most recently changed first, with their ids and links.No findings
Why it is in this group
- The name "list_maps" says "list": a word for reading.
Description, as the server wrote it
The user's maps, most recently changed first, with their ids and links.
Annotations the server declares
- readOnlyHint: true
search_mapsFind published animated maps on Moving Polygons (history, wars, empires, borders, epidemics, sea ice…) by words in their title or description and/or a year they cover.No findings
Why it is in this group
- The name "search_maps" says "search": a word for reading.
Description, as the server wrote it
Find published animated maps on Moving Polygons (history, wars, empires, borders, epidemics, sea ice…) by words in their title or description and/or a year they cover. Returns links to the interactive map, its text version and its article.
Annotations the server declares
- readOnlyHint: 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.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write2: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; get_public_map
publish_map
Can send data out2: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; get_public_map
publish_map

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_upload_link
The server marks "create_upload_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true}; The name "create_upload_link" 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 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http maps https://www.movingpolygons.com/mcp

claude mcp add --transport http maps https://www.movingpolygons.com/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__maps__get_import_format",
      "mcp__maps__get_account",
      "mcp__maps__list_maps",
      "mcp__maps__get_map",
      "mcp__maps__search_maps"
    ],
    "ask": [
      "mcp__maps__create_map",
      "mcp__maps__create_upload_link",
      "mcp__maps__publish_map",
      "mcp__maps__unpublish_map",
      "mcp__maps__get_public_map"
    ],
    "deny": [
      "mcp__maps__replace_map_content"
    ]
  }
}

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 maps. Review it before you use it.

Capability tags behind 2 rules

mcp__maps__publish_map untrusted-input, outbound
mcp__maps__get_public_map untrusted-input, outbound

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/com.movingpolygons/maps/verify?hash=a42173ae42573986b3edee8fe43e328dad788e416b8103d96df1c36cbd98e18f" | jq -e '.changed == false'

Pinned hash a42173ae4257, from Oct 22, 2026, 23:17 UTC.

Watch

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

https://anlyon.dev/servers/com.movingpolygons/maps/changes.xml

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

Badge

[![anlyon.dev](https://anlyon.dev/badge/com.movingpolygons/maps.svg)](https://anlyon.dev/servers/com.movingpolygons/maps)

Source: MCP Registry. Synced Oct 22, 2026, 23:17 UTC.