check_kr_working_day
Use this when you need a deterministic South Korea South Korea statutory public holidays and public-office substitute holidays for 2026 result. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when the packag...
This record as markdown: /tools/com-tttkmbb-calcgrid/check-kr-working-day.md
What check_kr_working_day does on Calcgrid
AI agents call check_kr_working_day to retrieve information from Calcgrid without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
date | string | Yes | Gregorian date in South Korea coverage. |
Parameters from the server's own tool schema.
Why check_kr_working_day is rated Low
Even though check_kr_working_day only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs check_kr_working_day safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Calcgrid, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_kr_working_day, this is the rule to start with:
check_kr_working_day is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Calcgrid, apply this rule, and every check_kr_working_day call is checked against it from then on.
Questions about check_kr_working_day
Use this when you need a deterministic South Korea South Korea statutory public holidays and public-office substitute holidays for 2026 result. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when the package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 schedules are not inferred. What it computes: Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2026 authority events. Example user requests: South Korea: New Labor Day public holiday. | South Korea: Published substitute holiday. Inputs: date (date). Complete JSON argument examples: {"date":"2026-05-01"} | {"date":"2026-10-05"} Outputs: territory, territory_name, weekday, is_working_day, day_type, holiday_names, holiday_kinds, holiday_details, calendar_scope, holiday_policy, substitute_day_policy, calendar_profile, dataset_version, sources. Formula: is_working_day = not an official Saturday/Sunday weekend date and no exact authority event Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/south-korea-public-working-day with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/south-korea-public-working-day.md. It is categorised as a Read tool in the Calcgrid MCP Server, which means it retrieves data without modifying state.
check_kr_working_day accepts 1 parameter: date. Required: date. The full parameter table on this page comes from the server's own tool schema.
Register the Calcgrid MCP server in PolicyLayer and add a rule for check_kr_working_day: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Calcgrid. Nothing to install.
check_kr_working_day is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the check_kr_working_day rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for check_kr_working_day. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
check_kr_working_day is provided by the Calcgrid MCP server (https://tttkmbb.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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