convert_lunar_to_solar
Use this when you know a lunar date such as 八月十五 or 闰六月初一 of a given lunar year and need the Gregorian date (e.g. for a lunar birthday or festival). Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you s...
This record as markdown: /tools/com-tttkmbb-calcgrid/convert-lunar-to-solar.md
What convert_lunar_to_solar does on Calcgrid
AI agents use convert_lunar_to_solar to create or update resources in Calcgrid, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Calcgrid environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
lunar_day | integer | Yes | Day of the lunar month, 1–30 (day 30 exists only in 30-day months). |
lunar_year | integer | Yes | Lunar year number (the year that starts at that year's Chinese New Year), 1900–2100. |
lunar_month | integer | Yes | Lunar month number 1 (正月) to 12 (腊月). |
is_leap_month | boolean | — | true when the date is in the intercalary month of that number (only valid in years that have that leap month). |
Parameters from the server's own tool schema.
Why convert_lunar_to_solar is rated Medium
An AI agent can call convert_lunar_to_solar faster than any human can review: one bad instruction and it creates or modifies resources in Calcgrid by the hundred, each call as confident as the last.
Attacks that exploit this kind of access
The rule that runs convert_lunar_to_solar 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 convert_lunar_to_solar, this is the rule to start with:
convert_lunar_to_solar stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. 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 convert_lunar_to_solar call is checked against it from then on.
Questions about convert_lunar_to_solar
Use this when you know a lunar date such as 八月十五 or 闰六月初一 of a given lunar year and need the Gregorian date (e.g. for a lunar birthday or festival). Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you start from a Gregorian date (use lunar-calendar-converter), or you want every festival of a year at once (use chinese-festivals). What it computes: Converts a Chinese lunar calendar date (year, month, leap-month flag, day) to the Gregorian date, reporting the weekday, the day's ganzhi (干支) and the length of that lunar month, and validating that the leap month and day exist in that year. Example user requests: What Gregorian date is lunar 2026 month 8 day 15? | 2025 年农历闰六月初一对应公历哪一天？ | Convert a Chinese lunar birthday to its Gregorian date and verify the leap-month flag. Inputs: lunar_year (integer); lunar_month (integer); is_leap_month (boolean, optional); lunar_day (integer). Complete JSON argument examples: {"lunar_year":2026,"lunar_month":8,"is_leap_month":false,"lunar_day":15} | {"lunar_year":2025,"lunar_month":6,"is_leap_month":true,"lunar_day":1} Outputs: gregorian_date, weekday, day_ganzhi, month_days, lunar_date_chinese, month_name, year_ganzhi, zodiac, julian_day_number, leap_month_note. Formula: JDN = start of the lunar month (new-moon day at UTC+8) + lunar_day − 1; month numbering per GB/T 33661-2017 (month 11 contains the winter solstice; leap month = first month without a 中气) Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/lunar-to-solar with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/lunar/lunar-to-solar.md. It is categorised as a Write tool in the Calcgrid MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
convert_lunar_to_solar accepts 4 parameters: lunar_day, lunar_year, lunar_month, is_leap_month. Required: lunar_day, lunar_year, lunar_month. 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 convert_lunar_to_solar: 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.
convert_lunar_to_solar is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the convert_lunar_to_solar 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 convert_lunar_to_solar. 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.
convert_lunar_to_solar 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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