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

Annotations already flag destructiveHint=true, readOnlyHint=false and non-idempotency, so the safety profile is partly covered. The description adds genuinely non-obvious behavior: the action is held rather than executed immediately, and a summary is surfaced in `say` before confirmation. It still doesn't say whether the applicant is notified or whether the action can be undone.

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?

Short and front-loaded with the purpose, but 'Held with the exact message first' is telegraphic and grammatically awkward, leaving the confirm/hold mechanic ambiguous. The final sentence about `say` is useful but sits after the muddled middle.

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 destructive, non-idempotent, open-world mutation with no output schema, the description covers the confirmation flow and the `say` summary. It omits applicant notification behavior, reversibility, and what a successful rejection produces, which matters given destructiveHint=true.

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 67%: application_id and confirmation_token are documented in the schema, and the description echoes 'optional feedback' for the undescribed feedback param. With the schema doing most of the work, this is baseline-adequate but adds no format or constraint detail beyond it.

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 states a specific verb+resource ('Turn an applicant down') that maps unambiguously to reject_applicant, and the title reinforces it. It does not, however, contrast with related siblings such as message_applicant, move_applicant, or stop_application, so differentiation is left to the name alone.

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?

'For the employer's own decision' implies a usage condition (employer-initiated rejection rather than an automated pipeline action), and 'Held with the exact message first' hints at a two-step confirm flow. But there is no explicit when-to-use/when-not statement or named alternative among the many applicant-related siblings.

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