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

With annotations already indicating a non-read-only, non-destructive mutation and no idempotency, the description adds the prerequisite that the person and job posting must already exist. It stops short of explaining side effects, idempotency_key behavior, or what happens on duplicate creation, but the annotation baseline lowers the burden.

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?

A single sentence that front-loads the action and packs the key qualifiers (source type and existence requirement) without filler. Every phrase contributes to selection and invocation.

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 flat four-parameter create operation, the description is minimally sufficient: it names the core entities and the required preconditions while annotations cover the mutation safety profile. The optional request_id/idempotency_key semantics and any post-create behavior remain unaddressed, leaving a clear but not fatal 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 description coverage is 0%, so the description has to compensate for parameter meaning. It semantically covers person_id and job_posting_id via 'existing person and job posting,' but it says nothing about request_id or idempotency_key, leaving two of four parameters effectively unexplained.

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 uses a specific verb ('Create') and resource ('application'), and narrows the action with 'recruiter or agent-sourced' and 'for an existing person and job posting.' This distinguishes it from sibling operations like update, transition, and archive without needing to introspect their schemas.

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?

The phrase 'for an existing person and job posting' gives a clear prerequisite and context for when to call this tool, and the create stance implies it is for adding rather than updating/transitioning. It does not, however, name alternatives or explicitly state when not to use it.

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