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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds only the control-plane endpoint mapping, which is modest extra context; it says nothing about what the response contains, auth beyond the account id, or error behavior for a missing job.

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?

Two tight sentences with the core purpose front-loaded; the endpoint path is compact and informative rather than padding. Nothing is wasted.

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 simple read-only lookup with complete schema coverage and annotations carrying the safety profile, the description covers what an agent needs. The only minor gap is that no output schema exists and the description doesn't hint at the returned job shape.

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 100%, so both parameters are already documented in the schema (job_id as resource segment, account_id overriding FIREWORKS_ACCOUNT_ID). The description's 'by id' only restates job_id and adds no syntax or format detail beyond the schema, making the baseline 3 correct.

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 (Get) and resource (a single supervised fine-tuning job) with the selector (by id), which cleanly distinguishes it from the sibling list_fine_tuning_jobs. An agent can identify the tool's job without opening the schema.

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 word 'single' and 'by id' implicitly signal this is the point-lookup counterpart to list_fine_tuning_jobs, giving clear usage context. However, it never names the alternative or states when not to use this tool, so it stops short of explicit routing guidance.

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