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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'Premium' but does not explain what that implies (e.g., authentication, rate limits, data granularity, or whether it is read-only). No side effects, requirements, or limitations are disclosed, leaving the agent with minimal 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 a single short sentence, which is concise and front-loaded with the core purpose. However, it is so brief that it omits essential context, making it under-specified rather than efficiently compact. It earns a middle score for being short but lacking substance.

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 no annotations, no output schema, and only 2 parameters, the description should provide enough context for an agent to call the tool correctly. It does not explain what 'Premium history' entails, whether it covers intraday or daily data, any restrictions on ticker format, or the meaning of limit. The description is incomplete for practical 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?

Schema description coverage is 0%, so the description must compensate for parameter meaning. It provides example ticker values (SKHY, 7709.HK) but does not explain the limit parameter's semantics or range. The defaults and types are in the schema, but no additional meaning is added for either parameter beyond the examples for ticker.

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 'Premium history for one hynix instrument' and gives concrete examples (SKHY, 7709.HK), making the verb-resource relationship explicit. It does not explicitly differentiate from siblings like get_hynix_snapshot, but the word 'history' and the examples make the purpose reasonably unambiguous.

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 gives no guidance on when to use this tool versus alternatives. It does not mention any exclusions, prerequisites, or contexts where another sibling (e.g., get_hynix_snapshot) would be more appropriate. The agent must infer usage from the name alone.

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