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

With no annotations, the description carries the full burden. It discloses that quotes are 'real-time' and that the call aggregates multiple indexes, which are useful behavioral traits. However, it does not mention default parameter behavior, rate limits, return structure, or any caveats, leaving notable gaps in transparency.

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 is exactly two sentences, front-loaded with the main purpose, and contains no redundant or filler content. Every phrase contributes to explaining what the tool does.

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?

Given the simple nature (one optional parameter, no output schema), the description adequately conveys the core functionality and use case. It does not elaborate on parameter effects, but for a batch quote tool this is a minor gap. The sibling list provides additional context for comparison.

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?

Schema coverage is 100% with a clear description for the 'short' parameter (default false). The tool description does not mention the parameter at all, adding no extra meaning beyond the schema. Baseline 3 is appropriate since schema fully documents the parameter.

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 the tool provides real-time quotes for stock indexes, with a scope of multiple indexes in a single request. It distinguishes from single-index tools by emphasizing 'wide range' and 'multiple indexes', but does not explicitly differentiate from sibling tools like getIndexQuotes.

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 implies usage for tracking market performance across many indexes at once, but lacks explicit when-to-use guidance or comparisons with alternatives such as getIndexQuote or getIndexShortQuote. Context is present but no exclusions or specific scenarios are provided.

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