# scientific_calculator

Evaluate a math expression with correct order of operations: + - * / % ^, parentheses, and functions (sqrt, sin, cos, tan, ln, log, exp, min, max, factorial via !). Constants pi, e. Angles in radians. Runs on smart-tools.xyz.

Agent View of the PolicyLayer registry record for `scientific_calculator`. HTML page: https://policylayer.com/tools/io-github-9thshini-smart-tools/scientific-calculator

## Facts

- Tool: `scientific_calculator`
- Server: SmartTools (`https://smart-tools.xyz/mcp`) — https://policylayer.com/tools/io-github-9thshini-smart-tools.md
- Homepage: https://github.com/https://smart-tools.xyz/mcp
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 2 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `locale` | string | no | Language for the source_url link (default en) |
| `expression` | string | yes | Math expression, e.g. "2+3*sqrt(16)" or "sin(pi/6)". Operators + - * / % ^ (% is remainder, ^ is power), functions sqrt/cbrt/abs/ln/log/log2/exp/sin/cos/tan/asi |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "scientific_calculator",
    "arguments": {
      "expression": "<expression>"
    }
  }
}
```

## Why scientific_calculator is rated High

scientific_calculator triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Risk signals: Accepts freeform code/query input (expression)

## Use case

AI agents invoke scientific_calculator to trigger actions in SmartTools. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches SmartTools:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "scientific_calculator": {
      "limits": [
        {
          "counter": "scientific_calculator_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on SmartTools (72)

- `remove_duplicates` — Destructive — https://policylayer.com/tools/io-github-9thshini-smart-tools/remove-duplicates.md
- `vat_calculator` — Destructive — https://policylayer.com/tools/io-github-9thshini-smart-tools/vat-calculator.md
- `age_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/age-calculator.md
- `angle_converter` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/angle-converter.md
- `area_converter` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/area-converter.md
- `aspect_ratio_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/aspect-ratio-calculator.md
- `base64` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/base64.md
- `bmi_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/bmi-calculator.md
- `bmr_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/bmr-calculator.md
- `body_fat_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/body-fat-calculator.md
- `case_converter` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/case-converter.md
- `color_converter` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/color-converter.md
- `compound_interest_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/compound-interest-calculator.md
- `cron_parser` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/cron-parser.md
- `csv_to_json` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/csv-to-json.md
- `csv_to_sql` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/csv-to-sql.md
- `date_difference_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/date-difference-calculator.md
- `discount_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/discount-calculator.md
- `due_date_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/due-date-calculator.md
- `electricity_cost_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/electricity-cost-calculator.md
- `energy_converter` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/energy-converter.md
- `file_hash` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/file-hash.md
- `fraction_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/fraction-calculator.md
- `fuel_cost_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/fuel-cost-calculator.md
- `gitignore_generator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/gitignore-generator.md
- `gpa_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/gpa-calculator.md
- `gradient_generator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/gradient-generator.md
- `hash_generator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/hash-generator.md
- `hours_calculator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/hours-calculator.md
- `htaccess_generator` — Execute — https://policylayer.com/tools/io-github-9thshini-smart-tools/htaccess-generator.md
- …and 42 more: https://policylayer.com/tools/io-github-9thshini-smart-tools.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-9thshini-smart-tools · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-9thshini-smart-tools