get_indices_bars_daily_topix

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

Annotations already declare readOnlyHint=true and idempotentHint=true, indicating safe read operation. The description adds useful behavioral context about Tier 1 cache and incremental fetching, which goes beyond annotations. No contradictions.

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 appropriately sized, front-loaded with purpose, and uses a clear format (bullet points for params). No redundant sentences. Slightly more could be condensed, but overall efficient.

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 (2 optional params) and presence of output schema and annotations, the description covers core aspects: cache behavior, parameter format, and supported plans. It does not detail pagination or default range but is largely complete for basic use.

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?

Input schema has 2 parameters with only type info (0% coverage). The description provides explicit format guidance (YYYYMMDD or YYYY-MM-DD) and their roles as start and end dates, adding meaning beyond the schema. Could mention default behavior when omitted.

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 tool name 'get_indices_bars_daily_topix' clearly indicates retrieval of daily TOPIX bars. The description confirms 'Retrieve daily TOPIX bars (OHLC)' and specifies the data type. Among siblings like 'get_indices_bars_daily' for other indices, this differentiates by index.

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 'Supports efficient incremental fetching via row-level (Tier 1) cache' and lists supported plans, but does not provide explicit guidance on when to use this tool versus alternatives like 'get_indices_bars_daily' or others. No when-not-to-use or exclusion criteria.

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