calculate_fraction_arithmetic

SERVERCalcgrid SOURCEhttps://tttkmbb.com/mcp

Medium RISK CLASS

Category Write

Parameters 32 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-tttkmbb-calcgrid/calculate-fraction-arithmetic.md

WHAT IT DOES

What calculate_fraction_arithmetic does on Calcgrid

AI agents use calculate_fraction_arithmetic 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
`operation`	string	—	Operation applied as fraction_a (operation) fraction_b.
`fraction_a`	string	Yes	First operand: a fraction '3/4', a mixed number '1 1/2' or '-1 1/2', a whole number '5' or a decimal '0.75'.
`fraction_b`	string	Yes	Second operand in the same formats.

Parameters from the server's own tool schema.

RISK

Why calculate_fraction_arithmetic is rated Medium

An AI agent can call calculate_fraction_arithmetic 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

RECOMMENDED RULE

The rule that runs calculate_fraction_arithmetic 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 calculate_fraction_arithmetic, this is the rule to start with:

calculate_fraction_arithmetic Rate-limited

calculate_fraction_arithmetic 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "calculate_fraction_arithmetic": {
      "limits": [
        {
          "counter": "calculate_fraction_arithmetic_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about calculate_fraction_arithmetic

What does the calculate_fraction_arithmetic tool do? +

Use this when you need an exact result of an operation on two fractions (e.g. 3/4 + 1/6), including mixed numbers such as 1 1/2, rather than a rounded decimal. 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 only want to reduce a single fraction or convert it to a decimal or percent (use fraction-simplifier), or you need the least common denominator of several denominators (use gcd-lcm). What it computes: Adds, subtracts, multiplies or divides two fractions, mixed numbers, whole numbers or decimals with exact integer arithmetic, returning the result in lowest terms, as a mixed number and as a decimal, with the intermediate steps. Inputs: fraction_a (string); fraction_b (string); operation (enum, optional). Complete JSON argument examples: {"fraction_a":"3/4","fraction_b":"1/6","operation":"add"} | {"fraction_a":"2 1/3","fraction_b":"5/6","operation":"subtract"} Outputs: result, mixed_number, numerator, denominator, decimal, working. Formula: a/b + c/d = (a·(L/b) + c·(L/d)) / L with L = lcm(b, d), a/b − c/d likewise; a/b × c/d = (a·c) / (b·d); a/b ÷ c/d = (a·d) / (b·c); the result is divided by gcd(numerator, denominator) Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/fraction-arithmetic with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/math/fraction-arithmetic.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.

What parameters does calculate_fraction_arithmetic accept? +

calculate_fraction_arithmetic accepts 3 parameters: operation, fraction_a, fraction_b. Required: fraction_a, fraction_b. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on calculate_fraction_arithmetic? +

Register the Calcgrid MCP server in PolicyLayer and add a rule for calculate_fraction_arithmetic: 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.

What risk level is calculate_fraction_arithmetic? +

calculate_fraction_arithmetic is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit calculate_fraction_arithmetic? +

Yes. Add a rate_limit block to the calculate_fraction_arithmetic 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 calculate_fraction_arithmetic completely? +

Set action: deny in the PolicyLayer policy for calculate_fraction_arithmetic. 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 calculate_fraction_arithmetic? +

calculate_fraction_arithmetic 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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