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

No annotations are provided, so the description must carry behavioral context. It discloses the source ('the hynix tracker service') and the returned content, and 'snapshot' implies a read-only fetch. It does not mention freshness, limits, or error behavior, but for a zero-parameter read tool these omissions are not critical.

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, front-loaded sentence that identifies the resource, purpose, and key fields with no filler or redundant phrasing.

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 no-parameter snapshot with no output schema, the description names the main returned elements and the data source, giving an agent enough context to invoke it correctly. It omits formatting and edge-case details, but the low complexity makes those non-essential.

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 zero parameters, so there are no parameter semantics to clarify. The baseline for no-parameter tools is 4, and the description appropriately does not invent unnecessary parameter details.

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 identifies the resource as an 'SK Hynix cross-market arbitrage snapshot' and names the contained fields (premium_pct, FX rates, base price). It is not a tautology and is specific enough to distinguish from generic stock tools, though it could more explicitly contrast with get_hynix_history.

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 word 'snapshot' and the focus on cross-market arbitrage imply this tool is for a current point-in-time view, and sibling get_hynix_history suggests a historical alternative. However, there is no explicit statement of when to use this tool versus alternatives.

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