Is the slonce.info.pl MCP server safe?

No scan can promise that. What its definitions show: 7 tools, 6 of which can change, send or delete something, and 1 finding from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the slonce.info.pl MCP server delete data?

No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.

Can the slonce.info.pl MCP server do things that cannot be undone?

Yes. 1 tool can send, pay, publish or merge: moon_phases.

What tools does the slonce.info.pl MCP server have?

7 tools: 1 irreversible, 5 write, 1 read. moon_phases, sun_times, sun_calendar, moon_times, clock_change, solstice and find_city.

Does the slonce.info.pl MCP server send data to outside services?

1 tool can carry data out (it sends, posts or publishes, or takes a recipient, channel or URL): moon_phases.

Has the slonce.info.pl MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 5, 2026.

slonce.info.pl MCP server

pl.info.slonce/slonceslonce.info.plstreamable-httpv1.0.0Scanned 2 hours ago

Sunrise, sunset, day length, golden hour, moon times and phases for Poland and anywhere.

7 tools: 1 do something that can't be undone, 5 change things and 1 only read.

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

With Anlyon

1 tool here does something that can't be undone. Govern it.

Anlyon lists the tools and adopts none.
Each tool you adopt gets approvals and receipts.
Your agent never holds the key.

Govern this server →

A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.

What the slonce.info.pl MCP server can do

The slonce.info.pl MCP server is published by slonce.info.pl, a domain the MCP Registry verified. It has 7 tools. It can do things that cannot be undone, such as sending, paying or publishing (moon_phases) and create or change data (5 tools: sun_times, sun_calendar, moon_times, clock_change and 1 more), but cannot delete data. 1 tool only reads.

1 tool can send data out of your system (moon_phases).

The fixed checks matched 1 finding (annotation-conflict). Each one comes with the text it matched.

Last scanned Nov 5, 2026, version 1.0.0.

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.

7 tools

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

moon_phasesThe new moons, first quarters, full moons and last quarters between two dates (two years at most; from today for 60 days by default), to the minute in a time zone (Polish time by d…Can send data out1 finding
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Findings
- Warn
  The server marks "moon_phases" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The input addresses people (input.to): what it sends cannot be taken back.
  What this check looks for
Description, as the server wrote it
The new moons, first quarters, full moons and last quarters between two dates (two years at most; from today for 60 days by default), to the minute in a time zone (Polish time by default).
Annotations the server declares
- title: New and full moons
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

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

clock_changeWhen the clocks change in Poland in a year (this year by default): the dates, which way and at what time, and the next change from today.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
When the clocks change in Poland in a year (this year by default): the dates, which way and at what time, and the next change from today.
Annotations the server declares
- title: Clock changes in Poland
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
moon_timesMoonrise and moonset at a place on a day (today by default), the moon's phase and lit part, a new or full moon or quarter that day, and the next new and full moon.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
Moonrise and moonset at a place on a day (today by default), the moon's phase and lit part, a new or full moon or quarter that day, and the next new and full moon.
Annotations the server declares
- title: Moonrise, moonset and phase
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
solsticeThe December and June solstices of a year (this year by default) to the minute, Polish time; with a place, also its shortest and longest day, the earliest sunset and the latest sun…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
The December and June solstices of a year (this year by default) to the minute, Polish time; with a place, also its shortest and longest day, the earliest sunset and the latest sunrise of the winter.
Annotations the server declares
- title: Shortest and longest day
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
sun_calendarSunrise, sunset and day length for every day of a month at a place, with the change of the day length from day to day; the link opens the same calendar to print on one A4 page.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
Sunrise, sunset and day length for every day of a month at a place, with the change of the day length from day to day; the link opens the same calendar to print on one A4 page.
Annotations the server declares
- title: Sunrise and sunset for a month
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
sun_timesSunrise, sunset, solar noon and day length at a place on a day (today by default), with how much longer or shorter the day is than the day before, civil, nautical and astronomical …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
Sunrise, sunset, solar noon and day length at a place on a day (today by default), with how much longer or shorter the day is than the day before, civil, nautical and astronomical twilight, and the golden and blue hours for photos. Local clock time, to the minute.
Annotations the server declares
- title: Sunrise and sunset
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Only reads 1Looks things up and changes nothing.Show 1 read-only tool

find_cityThe site's places whose name starts with the text (Polish or English names, with or without Polish letters): 258 places (Polish cities, places for trips and a few cities abroad), w…No findings
Why it is in this group
- The name "find_city" says "find": a word for reading.
Description, as the server wrote it
The site's places whose name starts with the text (Polish or English names, with or without Polish letters): 258 places (Polish cities, places for trips and a few cities abroad), with coordinates, time zone and page.
Annotations the server declares
- title: Find a place
- 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.

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 out1: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; moon_phases

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

Warnmoon_phases
The server marks "moon_phases" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The input addresses people (input.to): what it sends cannot be taken back.
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 slonce https://slonce.info.pl/mcp

claude mcp add --transport http slonce https://slonce.info.pl/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__slonce__find_city"
    ],
    "ask": [
      "mcp__slonce__sun_times",
      "mcp__slonce__sun_calendar",
      "mcp__slonce__moon_times",
      "mcp__slonce__moon_phases",
      "mcp__slonce__clock_change",
      "mcp__slonce__solstice"
    ],
    "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 slonce. Review it before you use it.

Capability tags behind 1 rule

mcp__slonce__moon_phases 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/pl.info.slonce/slonce/verify?hash=d721d8aae32007bcfcdb17e79599f2c62ea8fb43d26b56e3829c598d33da0eba" | jq -e '.changed == false'

Pinned hash d721d8aae320, from Nov 5, 2026, 17:18 UTC.

Watch

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

https://anlyon.dev/servers/pl.info.slonce/slonce/changes.xml

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

Badge

[![anlyon.dev](https://anlyon.dev/badge/pl.info.slonce/slonce.svg)](https://anlyon.dev/servers/pl.info.slonce/slonce)

Source: MCP Registry. Synced Nov 5, 2026, 17:18 UTC.