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ozp

yfinance

by ozp

get_stock_price_date_range

Get historical stock prices for any ticker symbol within a custom date range.

Instructions

Get stock prices for a date range.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
symbolYesStock ticker symbol.
start_dateYesStart date in YYYY-MM-DD format.
end_dateYesEnd date in YYYY-MM-DD format.
Behavior2/5

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

No annotations provided. Description does not disclose any behavioral traits beyond basic operation (no side effects, rate limits, or prerequisites mentioned). For a read operation, the description should at least hint at being non-destructive.

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

Conciseness3/5

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

Description is very concise (one sentence), but context with 3 parameters and no annotations could benefit from slightly more detail. It is appropriately front-loaded but may be too minimal.

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

Completeness2/5

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

Tool has many siblings and no output schema. Description does not explain return format or key behavioral details, leaving gaps for an agent to fully understand usage.

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%, so parameters are fully described in the schema. Description adds no additional meaning beyond the schema, meeting baseline.

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?

Description explicitly states it gets stock prices for a date range, which clearly distinguishes it from sibling get_stock_price_by_date (single date). The verb 'Get' and resource 'stock prices' are specific.

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?

No explicit when-to-use or when-not-to-use guidance. It is implied that this tool is for date ranges, but no alternatives or exclusions are mentioned.

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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