list_working_day_calendars
Use this before a working-day or business-day task to select the correct evidence package. It distinguishes the worldwide CLDR weekday/weekend baseline, the broad source-labelled OpenWorkdays national-scope reference, the clearly labelled OpenHolidays nationwide public-holiday reference, and the ...
This record as markdown: /tools/com-tttkmbb-calcgrid/list-working-day-calendars.md
What list_working_day_calendars does on Calcgrid
AI agents call list_working_day_calendars 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 |
|---|---|---|---|
territory | string | — | Optional CLDR alpha-2 territory code to return one route instead of all 272 routes. Use TW for 中国台湾省, CN for 中国大陆, or GB for the UK; codes are normalized to upp |
Parameters from the server's own tool schema.
Why list_working_day_calendars is rated Low
Even though list_working_day_calendars 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 list_working_day_calendars 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 list_working_day_calendars, this is the rule to start with:
list_working_day_calendars 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 list_working_day_calendars call is checked against it from then on.
Questions about list_working_day_calendars
Use this before a working-day or business-day task to select the correct evidence package. It distinguishes the worldwide CLDR weekday/weekend baseline, the broad source-labelled OpenWorkdays national-scope reference, the clearly labelled OpenHolidays nationwide public-holiday reference, and the official public-holiday calendars for mainland China, Singapore, Australia, the US, Canada, Japan, India's central government, UAE federal government, New Zealand, South Africa, Ireland plus the UK. The result contains one machine-readable route per CLDR territory, or one route when the optional territory filter is supplied, including whether holiday semantics are unsupported, reference-only, or require a jurisdiction-specific input such as the UK division, Australian state/territory or Indian office scope. US is OPM federal scope only; CA is Canada Labour Code federally regulated-employer scope and does not infer substitute days; JP is statutory national holidays only and does not infer employer closures; IN preserves Gazetted/Restricted classes and does not infer state/UT or local optional selections; AE is UAE federal-government scope with exact 2026 dates only and does not infer local/private schedules or unresolved lunar dates; NZ is national statutory dates only and does not infer regional anniversary days; ZA is national public holidays over a Monday-Friday baseline and does not infer employer holiday exchanges; IE excludes Good Friday and does not infer next-working-day closures for weekend holidays. This is read-only catalogue discovery; it does not calculate a date or count and must not be reported as a calculation success. It is categorised as a Read tool in the Calcgrid MCP Server, which means it retrieves data without modifying state.
list_working_day_calendars accepts 1 parameter: territory. 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 list_working_day_calendars: 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.
list_working_day_calendars 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 list_working_day_calendars 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 list_working_day_calendars. 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.
list_working_day_calendars 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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