io.github.theluckystrike/calendar-ics-reader-events-freebusy-conflicts

by theluckystrike · remote · local (mcpb) · no sign-in to list tools · v0.22.6 · published by GitHub user theluckystrike

Read the .ics your calendar exports: events in a window, free-busy, double bookings, export.

Deletes · 1Final · 2Changes · 5

Compare Registry entry

12 tools: 1 can delete or cancel things, 2 do something that can't be undone, 5 change things and 4 only read.

Scanned Oct 21, 2026

Deletes or cancels1Claude Code: deny: see these tools
Can't be undone2Claude Code: ask: see these tools
Changes things5Claude Code: ask: see these tools
Only reads4Claude Code: allow: see these tools

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

claude mcp add --transport http calendar-ics-reader-events-freebusy-conflicts https://mcp.zovo.one/mcp/calendar --header 'Authorization: <your-authorization>'

Findings

Matches of fixed checks, with the text they matched.

3 warn

Warnconflicts
The server marks "conflicts" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The description's first verb is "find": a word for reading.
What this check looks for
Warnevent_export
The server marks "event_export" 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 description's first verb is "call": a word for a change.
What this check looks for
Warnics_forget
The server marks "ics_forget" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The description's first verb is "remove": a word for removing or ending something.
What this check looks for

Tools

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

12 tools

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

ics_forgetRemove one imported calendar by name and delete this server's local copy of its .ics, freeing a slot.1 finding
Why it is in this group
- The description's first verb is "remove": a word for removing or ending something.
- The server marks it not destructive (destructiveHint: false), but an annotation never lowers a class.
Findings
- Warn
  The server marks "ics_forget" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The description's first verb is "remove": a word for removing or ending something.
  What this check looks for
Description, as the server wrote it
Remove one imported calendar by name and delete this server's local copy of its .ics, freeing a slot. Your own calendar and the source file are untouched. ics_import replaces a name in place.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false

Can't be undone 2Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

event_exportCall this tool to write chosen events to a new .ics file you can send or import elsewhere.1 finding
Why it is in this group
- The description's first verb is "call": a word for a change.
- 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.
Findings
- Warn
  The server marks "event_export" 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 description's first verb is "call": a word for a change.
  What this check looks for
Description, as the server wrote it
Call this tool to write chosen events to a new .ics file you can send or import elsewhere. Pass either ids (from events_list) or a from/to window. Times are written in UTC so the file lands correctly in any client.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
free_busyMerged busy blocks and the free gaps inside your working hours over a day range.No findings
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
Description, as the server wrote it
Merged busy blocks and the free gaps inside your working hours over a day range. Events marked free do not count; whole-day events block the day. Free: 31 days. Use conflicts for overlapping pairs.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false

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

conflictsFind double bookings: every PAIR of timed events that overlap, with the minutes they collide, across all calendars unless you name one.1 finding
Why it is in this group
- The description's first verb is "find": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
Findings
- Warn
  The server marks "conflicts" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The description's first verb is "find": a word for reading.
  What this check looks for
Description, as the server wrote it
Find double bookings: every PAIR of timed events that overlap, with the minutes they collide, across all calendars unless you name one. Whole-day events are reported apart. Free: 31 days. free_busy shows gaps.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
event_to_time_entryTake one event and return the exact arguments for the time-tracker's entry_add, so a meeting that already happened becomes billable time without retyping it.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
Take one event and return the exact arguments for the time-tracker's entry_add, so a meeting that already happened becomes billable time without retyping it. Writes nothing: pass the JSON straight to entry_add.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
ics_importCall this tool to read a calendar export and keep it under a name.No findings
Why it is in this group
- The name "ics_import" says "import": a word for a change.
Description, as the server wrote it
Call this tool to read a calendar export and keep it under a name. Give path (.ics file), text (contents), or url (public .ics/webcal feed; Pro). Google, Apple, Outlook exports read. Re-importing a name replaces it.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
license_activateTurn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle.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
Turn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle. Data under your token stays; a wrong or expired key changes nothing. license_status confirms it.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
next_eventThe first event not yet started, within the next 366 days, across every imported calendar or one you name.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
The first event not yet started, within the next 366 days, across every imported calendar or one you name. Returns title, times in your zone, how long until it starts, location, attendees and its id.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false

Only reads 4Looks things up and changes nothing.Claude Code: allow

calendars_listList imported calendars: name, event-definition count, size, source, import time and free-tier use of the 2 slots.No findings
Why it is in this group
- The name "calendars_list" says "list": a word for reading.
Description, as the server wrote it
List imported calendars: name, event-definition count, size, source, import time and free-tier use of the 2 slots. It also names stored .ics files with no calendar row. With none it prints the export steps.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
events_listEvery event between two dates, recurring expanded to occurrences, sorted by start.No findings
Why it is in this group
- The name "events_list" says "list": a word for reading.
Description, as the server wrote it
Every event between two dates, recurring expanded to occurrences, sorted by start. Times shown in your zone (profile's, else this machine's) unless zone passed. Each id works for event_export or event_to_time_entry.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
events_searchFind events whose title, description, location or attendees contain a phrase.No findings
Why it is in this group
- The name "events_search" says "search": a word for reading.
Description, as the server wrote it
Find events whose title, description, location or attendees contain a phrase. Searches every imported calendar. Without from/to it looks a year back and a year forward on Pro, and the free window either side of today.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
license_statusReport this endpoint's licence state for your token as JSON: the product, the tier free or pro, why it is not Pro, and the checkout URL.No findings
Why it is in this group
- The name "license_status" says "status": a word for reading.
Description, as the server wrote it
Report this endpoint's licence state for your token as JSON: the product, the tier free or pro, why it is not Pro, and the checkout URL. Call it to explain a free-tier refusal. No arguments, nothing changes.
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.

Install

Pinned to version 0.22.6. Values in angle brackets are yours to fill in.

claude mcp add --transport http calendar-ics-reader-events-freebusy-conflicts https://mcp.zovo.one/mcp/calendar --header 'Authorization: <your-authorization>'

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__calendar-ics-reader-events-freebusy-conflicts__license_status",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__calendars_list",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__events_list",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__events_search"
    ],
    "ask": [
      "mcp__calendar-ics-reader-events-freebusy-conflicts__license_activate",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__ics_import",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__free_busy",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__conflicts",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__next_event",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__event_export",
      "mcp__calendar-ics-reader-events-freebusy-conflicts__event_to_time_entry"
    ],
    "deny": [
      "mcp__calendar-ics-reader-events-freebusy-conflicts__ics_forget"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as calendar-ics-reader-events-freebusy-conflicts. Review it before you use it.

Keep track

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

https://anlyon.dev/servers/io.github.theluckystrike/calendar-ics-reader-events-freebusy-conflicts/changes.xml

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Source: MCP Registry · repository. Synced Oct 21, 2026, 18:50 UTC.

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