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 real context beyond that: exactly what is returned (company name, open-role count, company page, 10 newest jobs with links) and what the 'Apply with Applystead' link does. It doesn't cover the unknown-company case or any failure behavior.

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 and the return-shape sentence is efficient. The final sentence about Apply with Applystead creating an account and tailoring a résumé is somewhat tangential marketing context, though it does explain a returned link.

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 return-value explanation well, enumerating fields and the 10-job limit. The only real gap for a one-parameter read tool is what happens when the company is not found or is ambiguous.

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 already documents 'Company name or Applystead company slug.' The description restates that same fact without adding format, disambiguation, or slug-lookup behavior, so it is a baseline case.

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 opens with a specific verb and resource ('Looks up one company's open roles on Applystead') and scopes it to a single company, which implicitly separates it from the general get_jobs/search_jobs siblings. It does not explicitly name an alternative, so it stops short of the 5 bar.

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?

Concrete example questions ('is Stripe hiring?', 'what jobs does Acme have open?') give a clear sense of when to reach for this tool. There is no explicit when-not-to-use guidance or named alternative such as get_jobs for cross-company searches.

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