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

Goes well beyond the annotations by disclosing the deferred-completion model: the tool returns a personal link valid 72 hours, the application is not actually sent until the candidate opens the page, attaches a CV, and consents to data processing. That consent/data-handling detail and the human-in-the-loop constraint are exactly the kind of context annotations cannot express.

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?

Front-loads the action, then the return contract, then the gating and prohibition, in three dense sentences with no filler. Nothing could be removed without losing an operative constraint.

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 compensates by explaining the return value (a personal link, 72-hour validity) and the asynchronous nature of the actual submission. For a mutation tool with no output schema, this is complete enough to call correctly.

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 100%, including the origin of the slug ('from search_offers or get_offer') and the lang default, so the schema carries the parameter burden. The description adds only the framing that firstName/lastName/email belong to the candidate; baseline 3 is appropriate.

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 (prepare/start an application) plus the resource (an offer from Actual group) and the actor (on behalf of the candidate being assisted). This is clearly distinguishable from the read-only discovery siblings (search_offers, get_offer, find_agencies), which only surface offers.

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 precondition: only call when the candidate has asked to apply and supplied name and email, and an explicit behavioral rule: never submit the page, hand the link to the candidate. It does not name a sibling alternative for the discovery step, but the gating conditions are unambiguous.

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