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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new behavioral context: coverage is partial and the response reports how many employer boards were checked, results are 'roles RoleWeek saw' not all hiring, the response links the weekly page and states the date window, and employer text is treated as untrusted data.

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?

Purpose is front-loaded, but the body is a single dense run-on sentence stacking many metric clauses, which makes it harder to scan than a short bulleted or multi-sentence structure. The content is largely justified, but the packaging costs readability.

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?

With no output schema, the description carries the burden of describing returns and does so: it names the metrics, the date window, the linked weekly page, the coverage caveat and the untrusted-text handling. An agent has everything needed to call it and interpret the result.

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%, so the baseline is 3, but the description adds meaning beyond the schema by clarifying that any date inside the week is accepted and that the in-progress week is never published — a constraint the schema does not express.

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?

States a specific verb and resource ('weekly report on developer hiring') and enumerates the exact metrics returned (new roles by city/employer/type/level, salary share, median, 'No account needed' share, week-over-week comparison). This clearly separates it from the sibling tools search_jobs, get_job, salary_summary and company_overview, which are per-role or per-company rather than weekly aggregates.

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?

Gives clear operating context: one finished Monday–Sunday Pacific week at a time, 'latest' as default, and the explicit exclusion that the week in progress is never published. It does not explicitly name when to prefer a sibling (e.g. salary_summary for a single figure), so it stops short of full when/when-not routing.

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