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tresor4k

macalc

calculate_dollar_cost_average

Calculate the total value and return of a dollar-cost averaging crypto investment using periodic investment amount, number of periods, average purchase price, and current price.

Instructions

Calculate DCA portfolio value and performance for recurring crypto investments. See list_bundles for related 'crypto' calculators.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
investment_per_periodYesAmount invested per period in fiat currency
periodsYesNumber of investment periods
average_priceYesAverage purchase price per unit over all periods
current_priceYesCurrent market price per unit

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.
Behavior2/5

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

No annotations exist, and the description only mentions calculation without disclosing behavioral traits such as side effects, read-only nature, or output details beyond the return value.

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 a single concise sentence with a reference, containing no superfluous words and front-loading the purpose.

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?

For a simple calculator, the description is adequate given the presence of an output schema and the reference to related tools, though it could mention which currencies are supported.

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 coverage is 100% with parameter descriptions in the schema. The description adds context about DCA and crypto but does not significantly enhance parameter meaning beyond what is already provided.

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 the verb 'Calculate' and the resource 'DCA portfolio value and performance for recurring crypto investments,' with a reference to list_bundles for related calculators, distinguishing it from siblings.

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

Usage Guidelines3/5

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

The description provides a pointer to list_bundles for related crypto calculators but does not explicitly state when to use this tool versus alternatives or provide prerequisites.

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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