calculator
Calculate Math Expressions Quickly
Manual arithmetic checks slow agents when users need quick numeric answers. This skill evaluates basic math expressions and returns concise results.
Install with my Agent
Copy this request to your Agent. It includes the canonical Skill page and manifest.
Review the Skillstore skill "calculator" from https://skillstore.io/skills/decalogue-calculator.md and its manifest at https://skillstore.io/api/skills/decalogue-calculator/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
Agent-readable resources
Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.
Test it
Using "calculator". 2 + 3 * 4
Expected outcome:
14, because multiplication is applied before addition.
Using "calculator". (5 + 3) * 2
Expected outcome:
16, because the grouped addition is evaluated first.
Using "calculator". 10 / 0
Expected outcome:
Error: division by zero.
Security Audit
SafeThe eval finding in calculator.py is confirmed because caller-provided expressions reach Python eval after only a regex whitelist. The SKILL.md findings are false positives caused by Markdown inline code, fenced examples, and file names. No evidence found for prompt injection, data exfiltration, network use, or malicious prose.
Capability review items (1)
These are real local capabilities that may be expected for this skill, so they require review but are not counted as confirmed malicious behavior.
Risk Factors
⚡ Contains scripts (1)
⚙️ External commands (9)
Share & cite this report
Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.
Copy report link
https://skillstore.io/skills/decalogue-calculator/audits/11?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_reportMarkdown badge
[](https://skillstore.io/skills/decalogue-calculator?utm_source=security_passport_badge)HTML badge
<a href="https://skillstore.io/skills/decalogue-calculator?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/decalogue-calculator/security.svg" alt="Skillstore security assessment" loading="lazy"></a>Embed card
<iframe src="https://skillstore.io/embed/skills/decalogue-calculator.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>Academic citations (APA · BibTeX · CFF)
APA citation
AI Creator. (2026). calculator security audit report (audit version 11) [Author version 1.0.0]. Skillstore. https://skillstore.io/skills/decalogue-calculator/audits/11BibTeX citation
@techreport{ai-creator-decalogue-calculator-2026,
author = {AI Creator},
title = {calculator security audit report (audit version 11)},
institution = {Skillstore},
year = {2026},
number = {11},
url = {https://skillstore.io/skills/decalogue-calculator/audits/11},
note = {Author version 1.0.0}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "calculator security audit report (audit version 11)"
version: "1.0.0"
type: report
authors:
- name: "AI Creator"
date-released: "2026-07-09"
url: "https://skillstore.io/skills/decalogue-calculator/audits/11"
identifiers:
- type: other
value: "skillstore:decalogue-calculator:audit:11"
description: "Skillstore immutable audit report identifier"
Compare variants
2 installable variantsEach author remains a separate installable skill. The recommended variant is ranked by Skillstore evidence.
Why this variant is first
decalogue-calculator
2026-09-09
code-and-sorts-calculator
2026-09-09
Skillstore Score
Why this score Evidence Confidence: HighWhat You Can Build
Check classroom arithmetic
Solve basic expressions and show the result for homework review or study support.
Verify product calculations
Confirm simple totals, ratios, and formulas during planning work.
Test agent math responses
Compare an assistant response with a deterministic calculation for common arithmetic prompts.
Try These Prompts
Use the calculator skill to solve 2 + 3 * 4. Explain the order of operations briefly.
Calculate (5 + 3) * 2 with the calculator skill. Return the final value and one short explanation.
Calculate 10 * 5 + 20 and 100 / 4 - 10. Tell me which result is larger.
Verify (18.5 + 6.5) / 5 + 2^3. Report the final value and any calculation errors.
Best Practices
- Keep expressions short and explicit.
- Use parentheses when operator precedence could be unclear.
- Review error messages before trusting a failed calculation.
Avoid
- Do not submit formulas with variables, functions, or named constants.
- Do not use this skill for safety-critical decisions without independent verification.
- Do not expose the current implementation to untrusted public input.
Frequently Asked Questions
What operations does this skill support?
Can it handle variables or functions?
Does it explain each calculation?
Is it safe for untrusted public input?
Can Claude, Codex, and Claude Code use it?
What happens when a calculation is invalid?
Developer Details
Author
AI CreatorLicense
MIT
Author version
v1.0.0
Skillstore revision
r1
Ref
26421118b848d9f1efc0aa169d8a7a9e7e0a877e
Maintenance freshness
7/18/2026
Usage
7 downloads · 223 views
File structure