get_indices_bars_daily_topix

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

Annotations already declare read-only, idempotent, and non-destructive behavior. The description adds valuable context beyond annotations: row-level Tier 1 caching, efficient incremental fetching, and supported plans, which helps the agent understand performance and access constraints.

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 fairly concise but has redundancy: 'Retrieve daily TOPIX bars (OHLC)' and 'Returns daily OHLC data for TOPIX' convey the same information, and the cache detail is repeated. It could be tightened without losing meaning.

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 output schema and annotations, the description covers the essential aspects: purpose, date formats, caching behavior, and plan restrictions. It is sufficiently complete for a simple two-parameter read-only tool.

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 schema has no parameter descriptions (0% coverage), but the description compensates fully by documenting date_from and date_to with formats (YYYYMMDD or YYYY-MM-DD) and their roles as start/end dates for the range query.

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 action and resource: 'Retrieve daily TOPIX bars (OHLC)' and mentions a dedicated endpoint, distinguishing it from generic index bar tools like get_indices_bars_daily.

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?

It provides clear context for when to use the tool: for daily TOPIX OHLC data with efficient incremental fetching via Tier 1 cache, and lists supported plans. However, it does not explicitly mention alternatives or when-not conditions.

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