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

Goes well beyond the annotations (destructive/openWorld/idempotent) by disclosing the preview-then-confirm flow, that the preview mutates nothing, that the confirmation expires in 15 minutes and is bound to these exact arguments and current candidate state, that a retried send is safely answered from the first result, and the decisions_not_allowed permission failure. That is exactly the behavioral context an agent needs before a destructive send.

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?

Dense but front-loaded: the purpose lands in the first sentence and the numbered two-step protocol follows in order. Some procedural coaching ('Show the member the emails and the effects, in full') is longer than strictly necessary, but it earns its place by preventing a skipped confirmation.

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, confirmation-gated send, the description covers everything needed: preconditions, the preview/send split, confirmation lifetime and invalidation, failure mode, and retry semantics. The output schema exists and the description still names the returned artifacts (emails, effects, confirmation) so the agent knows what to present.

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 description coverage is 0%, so the description carries the burden, and it does explain the non-obvious params: send=false previews with no side effects, confirmation must accompany send=true, and retry safety implies idempotency_key usage. job_id and application_id are left unstated, but their meaning is unambiguous from the name and required list.

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: emailing an invited candidate their AI interview invitation again, with the reason (lost email or did not book) and the payload (book link or start link). It does not distinguish itself from near-siblings such as reinvite_candidate, resend_booking_link, or send_held_invitation, so an agent must infer which invitation-resend path applies.

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 triggering condition ('a candidate who lost the email or did not book') and a full when-to-use protocol (preview first, send only after member consent). It lacks explicit when-NOT guidance relative to the sibling resend/reinvite tools, which is the one gap.

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