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

Annotations already cover read-only, idempotent and closed-world behavior, so the description's job is lighter. It adds genuinely useful context the annotations don't: the index is weekly, job-posting based, Korea-scoped, and 'latest' is the default. It does not say what happens with an unknown or out-of-range week key, or how stale the 'latest' value can be.

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?

Two tight sentences with the identity and scope front-loaded and no filler. The second sentence largely duplicates the schema's parameter description, which is the only wasted text.

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 one-optional-parameter read tool with full annotations, the definition is nearly sufficient. However, there is no output schema, so the description is the only place an agent could learn what the index value actually looks like (units, baseline, components), and it stays silent on that.

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 coverage is 100% and the single parameter's meaning is fully documented in the schema. The description restates the same 'latest'/'2026-W42' format without adding anything new, such as how week boundaries are defined or whether a malformed key errors or falls back.

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?

Names the specific resource (VLSI Semiconductor Hiring Index), its cadence (weekly), domain (semiconductor hiring activity, job-posting based) and geography (Korea). That is enough to distinguish it from siblings like get_market_movers or get_news_feed, though it never explicitly contrasts itself with any of them.

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 only usage instruction is about the parameter ('use week=latest or a key like 2026-W42'), which is schema content, not selection guidance. There is no statement of when this tool is the right choice, when it is not, or what to use instead.

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