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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful behavioral context by describing the returned content, though it says nothing about authorization, workspace scoping, or failure behavior for a missing UUID.

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?

Three short, front-loaded blocks: purpose, exclusion, and prerequisite tip. Every sentence carries actionable information with no repetition or filler.

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 annotations covering safety, an output schema covering return values, and the sole parameter fully documented, the description only needs purpose, routing, and prerequisites — all of which are present. Nothing an agent needs to invoke it correctly is missing.

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% and the schema already disambiguates 'uuid' from the numeric 'id'. The description restates the UUID requirement and the tip implies how to obtain one, but adds no format or syntax detail beyond the schema — baseline 3.

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 ('Fetches') and resource ('full details of a single job application by its UUID') and enumerates what the payload contains (status history, correspondence dates, job description, metadata). This is clearly distinguishable from search_job_applications (list/search) and find_job_application (likely lookup by other keys).

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 do-not-use case naming the exact sibling to use instead (list_job_application_notes) with sample user phrasings. It also supplies a prerequisite path — call search_job_applications first when only a company name is available — which is exactly the routing guidance an agent needs.

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