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

Annotations already declare destructiveHint=true, openWorldHint=true and idempotentHint=false, so the safety profile is covered; the description adds real context beyond them: it SUBMITS in the person's name, lists prerequisites (saved CV, confirmed email, active plan), and explains that dry_run=true 'prepares and sends nothing'. It stops short of failure/retry behavior, which keeps it from a 5.

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 usage trigger, then the sibling comparison, then behavior and prerequisites. Every clause carries information; no filler or restatement of the name.

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 mutation with no output schema and half-documented parameters, the description covers trigger, prerequisites, submission semantics and dry-run behavior. It omits what happens on failure or whether an application can be withdrawn, a minor residual gap.

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 only 50% — pool_job_id is documented in the schema, but dry_run has just a default and no description. The description compensates by defining dry_run's semantics ('prepares and sends nothing') and clarifying the single-job scope tied to pool_job_id.

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 (apply) and resource (live job), and scopes it precisely to a single result from search_live_jobs. It also explicitly differentiates itself from the sibling apply_to_public_job by naming the parameter that distinguishes them (pool_job_id).

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?

Opens with the triggering condition ('Use after search_live_jobs when the person picks one of the results'), names the sibling alternative, and adds a required human-in-the-loop step ('Confirm with the person first'). Nothing about when to pick this tool is left to inference.

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