getEODDataBulk

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

Annotations already provide readOnlyHint, idempotentHint, and openWorldHint, indicating a safe read operation. The description adds minimal behavioral context beyond being a bulk API, so it meets the baseline but does not exceed it.

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?

The description consists of two concise sentences: first stating the purpose, second the target audience. It is efficient and front-loaded, though not exceptional.

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?

The tool claims to retrieve data for multiple symbols, but the input schema only includes 'date'—no symbols parameter. The description does not clarify how symbols are specified, leaving a significant gap. Additionally, no return value details are given, though no output schema exists.

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?

The input schema fully describes the sole parameter 'date' with format YYYY-MM-DD, providing 100% coverage. The description adds no additional meaning, meeting the baseline of 3 for high coverage.

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?

The description clearly states 'retrieve end-of-day stock price data for multiple symbols in bulk,' specifying the action and resource. However, it does not explicitly differentiate from sibling tools like getBatchQuotes or getQuote, which also retrieve stock data for multiple symbols.

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?

The description says it is 'ideal for financial analysts, traders, and investors who need to assess valuations for a large number of companies,' implying bulk use but not when to prefer over single-symbol tools. No exclusions or alternatives are mentioned.

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