Skip to main content
Glama
tresor4k

macalc

calculate_ohms_law

Calculate voltage, current, or resistance using Ohm's law. Enter any two values in volts, amps, or ohms to find the third.

Instructions

Compute Ohm's law: V=I·R. Solve for any of V, I, R given the other two. Use for electronics. Inputs: any 2 of (V volts, I amps, R ohms). Returns the third. See list_bundles for related 'science' calculators.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
voltageNoVolts
currentNoAmps
resistanceNoOhms

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultNoComputed result. Object whose fields depend on the tool (e.g. {tax, marginal_rate, brackets} for tax tools, {volume_l, gallons} for volume tools).
formulaNoHuman-readable formula or method used (e.g. "I=P·r·t", "Magnus formula").
sourceNoAuthoritative source for the rule or formula (e.g. "Article 197 CGI", "NF DTU 21").
reference_urlNoLink to a calcul2 page documenting the calculation in detail.
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the burden. It discloses the core behavior (solving for one variable given two) but lacks details on precision, rounding, error handling, or any side effects. It is adequate but not comprehensive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise: two sentences and a reference to related tools. Every sentence adds necessary information without fluff. Front-loaded with the core formula.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the output schema exists (not shown but indicated), the description is mostly complete. It covers the purpose, usage, and parameter selection. Minor gap: no mention of unit conversions or precision, but not critical for a calculator tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema covers all parameters (voltage, current, resistance) with brief descriptions. The description adds value by clarifying 'any 2 of (V volts, I amps, R ohms)' and the relationship between them, which is beyond the schema's individual explanations.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Compute Ohm's law: V=I·R' and specifies the verb 'compute/solve' and resource 'Ohm's law'. It distinguishes from sibling calculators by referencing 'list_bundles for related science calculators', making the purpose unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It provides explicit context: 'Use for electronics.' and specifies inputs ('any 2 of V, I, R') and output ('Returns the third'). It does not state when not to use or provide alternatives, but the guidance is sufficient for basic usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/tresor4k/macalc-mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server