API Tool Calls

One-Rep Max Calculator

one_rep_max_calculator

Read-onlyIdempotent

Calculate Epley and Brzycki one-rep maximum estimates from lifted weight and repetitions.

Example tool call

This call uses example arguments supplied in the tool’s input schema.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "reps": 5,
      "weight": 100
    },
    "name": "one_rep_max_calculator"
  }
}

Input Schema

Name	Required	Description	Default
`reps`	Yes
`units`	No	Weight unit; returned estimates have the same unit	kg
`weight`	Yes	Lifted weight; results use the same unit

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

AddedOct 4, 2026

TDQS

A3.6/5.0

Behavior3/5

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

Annotations already declare the tool is read-only, idempotent, non-destructive, and closed-world. The description adds methodological transparency by naming the Epley and Brzycki formulas, but does not disclose any safety, permission, or rate-limit behavior beyond that.

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?

A single front-loaded sentence with no filler. It states the purpose, method, and required inputs efficiently.

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?

The description covers the core calculation and inputs, and the output schema handles return values. Minor gaps remain, such as not mentioning the optional units parameter or the 1–12 rep range, but these are fully documented in the schema.

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

Parameters3/5

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

Schema description coverage is 67%, with weight and units documented in the schema and reps constrained by min/max. The description only restates that weight and repetitions are inputs, adding no extra meaning such as unit handling or rep limitations.

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 states a specific verb ('Calculate') and resource ('one-rep maximum estimates') and names the two formulas used (Epley and Brzycki). It clearly distinguishes this tool from other calculator siblings by its unique domain.

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

Usage Guidelines2/5

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

The description gives no guidance on when to use this tool versus alternatives, nor any prerequisites or exclusions. Usage is only implied by the resource name and inputs.

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

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