jp-calendar-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| jp_check_dateA | Check whether a Japanese calendar date is a business day. Returns weekday, weekend/public-holiday flags and a business-day flag. Public holidays are bundled for 2020-2031. |
| jp_shift_daysA | Move a date forward or backward by N days, either in business days (skipping weekends and Japanese public holidays) or calendar days. Negative values move backward. |
| jp_count_daysA | Count calendar days and business days between two dates (Japanese holidays excluded from business days). Order of the two dates does not matter. |
| jp_to_warekiA | Convert a Gregorian date to the Japanese imperial era format (令和/平成/昭和/大正/明治). Era boundaries are handled to the day. |
| jp_from_warekiA | Convert a Japanese era date to the Gregorian calendar. Warns when the given month/day falls outside that era. |
| jp_ideco_tax_savingA | Calculate the annual income-tax and residence-tax reduction from iDeCo contributions in Japan (contributions are fully deductible). Deduction effect only. |
| jp_furusato_limitA | Calculate the furusato-nozei (hometown tax donation) limit where the out-of-pocket cost stays at 2,000 yen, using the residence-tax income levy from the annual tax notice. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 7 tools
Each tool targets a distinct operation: checking a date's business status, shifting by days, counting days between dates, and converting between Gregorian and Japanese eras. The two tax tools are also clearly separate from each other and from the calendar tools.
The common 'jp_' prefix helps, but the naming pattern is mixed: verb_noun (check_date, shift_days, count_days), directional (to_wareki, from_wareki), and noun phrases (ideco_tax_saving, furusato_limit). This inconsistency is noticeable but does not severely hinder readability.
Seven tools is a well-scoped count for a Japan-specific utility server. Each tool earns its place, and the set is neither bloated nor too thin.
The calendar tools cover the core business-day and era-conversion workflows thoroughly. The two tax tools are useful but feel like an add-on to a calendar-focused server, leaving some potential gaps in tax coverage.