us-stock-price

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

Discloses source, live data nature, cost, and data availability. No annotations provided, so description carries the burden well. No mention of rate limits or auth, but minimal given simplicity.

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

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

Two sentences, no fluff, front-loaded with core purpose. Every sentence adds value: function, source, cost. Excellent conciseness.

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

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

Covers essential aspects: what it returns, source, cost, availability. Lacks description of output format, but for a simple price tool, this is sufficient. No output schema, but not critical.

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

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

Single parameter 'ticker' with clear description in schema. Description adds no new param info beyond what schema provides. Schema coverage is 100%, so baseline 3 is appropriate.

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

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

Clearly states it returns current US equity price and intraday metrics for any NYSE/NASDAQ ticker. Specific verb, resource, and scope. Distinguishes from sibling tools like intl-stock-price or stock-price-multi.

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

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

Indicates source (Yahoo Finance), no API key, live during market hours, and cost. Implicitly suggests use for current US stock data, but lacks explicit exclusions or alternative tools.

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