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

Annotations only establish that this is a safe, idempotent read; the description adds substantive context beyond them: the page is rendered at open time under this key's permissions ('shows only what this key may see'), the link is single-use with an hour of life, unopened links expire after 7 days, it is free, and its Settings changes route through hiring_setup_careers under this key's scope and approval rules. These are exactly the traits an agent cannot infer from the schema.

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 second sentence is a long run-on chaining three separate rules with colons and clauses, and the description ends with a duplicated 'Free. Free.' The information largely earns its place, 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?

For a zero-parameter, no-output-schema tool, the description covers what is returned (a link), what the page shows, permission scoping, lifetime, cost, and the related setup path. The only soft spot is that the exact return shape (a URL string?) is implied rather than stated, but nothing essential for correct invocation is missing.

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 tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline applies. The description correctly introduces no arguments and does not invent any options the caller might look for.

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 concrete verb and resource (a one-time link to the hiring overview) and enumerates what the page contains: applicant stages and next steps, pending tests/interviews, open jobs, plus the sealed-application caveat. It also anchors the tool against siblings by saying it is 'the same page as account_dashboard_link with area hiring', so an agent can separate it from the account and HR dashboards.

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 an explicit gating rule ('Only when the person you work for asks to see it themselves'), names the alternatives to use first ('screen, move, test and invite with hiring's own tools ... and answer from them'), and describes the exact trigger for offering the link ('when they would rather look through the pipeline, making it once they say yes'). Both when-to-use and when-not-to-use are present.

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