getIndex1HourData

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

The annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so the description's burden is reduced. It adds context about providing 'price movements and volume' but does not disclose potential limitations like data availability, rate limits, or pagination. This is adequate but not rich.

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 two sentences long, front-loading the core purpose and adding context efficiently. Every sentence serves a purpose without redundancy or fluff.

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?

For a simple read-only data tool with good annotations, the description covers the main purpose and use case. A minor gap is the lack of explanation of what happens when from_date and to are omitted (assumed recent data). Still, it is largely complete for this moderate complexity.

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 has 100% description coverage, with each parameter already explained (e.g., symbol, from_date, to). The description adds no new meaning beyond what the schema provides, so the baseline score of 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?

The description clearly states it accesses 1-hour interval intraday data for stock indexes, specifying the resource ('stock indexes') and the interval ('1-hour'). It distinguishes from sibling tools like getIndex1MinuteData and getIndex5MinuteData by explicitly mentioning the 1-hour interval, and from getIndexQuote by focusing on intraday time series.

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 indicates it is 'ideal for tracking medium-term market trends during the trading day,' providing clear context for when to use this tool over shorter or longer interval tools. However, it does not explicitly name alternatives or state when not to use it, which would elevate to a 5.

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