time_fold

SERVERBalance Engine SOURCEbalance-engine-mcp

Low RISK CLASS

Category Other

Parameters 30 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/balance-engine-mcp/time-fold.md

WHAT IT DOES

What time_fold does on Balance Engine

AI agents call time_fold as a supporting operation in Balance Engine workflows.

Parameter	Type	Required	Description
`date`	string	—	Date YYYY-MM-DD. Default: today in Asia/Shanghai. Use when the user asks about a specific day.
`month`	string	—	Month YYYY-MM if not passing date. Pins the flow-month.
`locale`	string	—	Reply language. zh (default) or en.

Parameters from the server's own tool schema.

RISK

Why time_fold is rated Low

Without any rule in front of it, every call an agent makes to time_fold happens silently: no trail, no cap, no way to know it misbehaved until something breaks downstream.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs time_fold safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Balance Engine, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For time_fold, this is the rule to start with:

time_fold Rate-limited

time_fold gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "time_fold": {
      "limits": [
        {
          "counter": "time_fold_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Balance Engine, apply this rule, and every time_fold call is checked against it from then on.

FAQ

Questions about time_fold

What does the time_fold tool do? +

This tool looks up a deterministic rules engine. Same day → same answer. Do not invent pillars or fortune claims. Call when the user asks 时间折叠 / 现在叠的是哪一年 / 这个月对应哪一年 / time folding / nonlinear time / 甲午月是哪一年. Lead with this month’s fold year (same pillar). Ask the user what they lived that year — do not invent a biography. Then the 12-row table. Same table for everyone. Dayun is personal. Public · local · no API key. Preview ≠ prediction. It is categorised as a Other tool in the Balance Engine MCP Server, which means it performs auxiliary operations.

What parameters does time_fold accept? +

time_fold accepts 3 parameters: date, month, locale. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on time_fold? +

Register the Balance Engine MCP server in PolicyLayer and add a rule for time_fold: 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 Balance Engine. Nothing to install.

What risk level is time_fold? +

time_fold is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit time_fold? +

Yes. Add a rate_limit block to the time_fold 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.

How do I block time_fold completely? +

Set action: deny in the PolicyLayer policy for time_fold. 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.

What MCP server provides time_fold? +

time_fold is provided by the Balance Engine MCP server (balance-engine-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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