get_indices_bars_daily_topix

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

Annotations already indicate read-only, idempotent, and non-destructive behavior, so the description adds value by detailing the Tier 1 caching mechanism and support for incremental fetching. It also notes the dedicated endpoint. No contradictions with annotations.

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 concise and well-structured: a clear first sentence stating purpose, followed by a confirmation, then caching detail, supported plans, and parameter descriptions. Every sentence adds value with no redundancy.

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 tool's simplicity (two optional parameters, output schema exists), the description covers the core purpose, caching behavior, and parameter formats. It includes plan restrictions. It is nearly complete, though it could briefly mention how it differs from similar index bar tools.

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 0% description coverage, so the description carries the full burden. It provides explicit format examples (YYYYMMDD or YYYY-MM-DD) and clarifies that these define a date range. This adds substantial meaning beyond the schema's basic type information.

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 retrieves daily TOPIX OHLC bars, which is a specific verb and resource. However, it does not explicitly differentiate from sibling tools like get_indices_bars_daily, which may also serve indices data. The name provides some distinction, but the description lacks direct comparative language.

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 mentions efficient incremental fetching via Tier 1 cache, implying suitability for repeated queries, but does not provide explicit guidance on when to use this tool over alternatives or when not to use it. No exclusions or comparisons are made.

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