8 min readcalculate
How to give AI agents exact math with a calculator tool
LLMs guess at arithmetic, and floats round 0.1 + 0.2 wrong. Why agents miscalculate and how to give them an exact, safe calculator tool over MCP or REST.
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Guides for agents that don't guess.
What each tool on the belt checks, worked examples you can verify by hand, and how to connect it to your agent over MCP or REST.
11 min readdatetime
How to get time zones, daylight saving time and date math right in AI agents
LLMs guess weekdays, UTC offsets and DST changes. Why agents get dates wrong and how to give them an exact IANA time zone and date calculator over MCP.
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How to validate IBANs, ISBNs, GTINs, UUIDs and Luhn numbers in AI agents
Language models guess check digits. How IBAN MOD97, ISBN, GTIN, Luhn and UUID validation works, and how to give your AI agent an exact validator over MCP.
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