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

Annotations already declare readOnlyHint/non-destructive, so safety is covered; the description adds the useful behavioral fact that this is a preview step whose output includes welcome-credit effect, shortfall, feasibility, and a balance-page link. It does not say whether the quote expires, is cached, or how it reacts to infeasible inputs, which keeps it below 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?

A single tightly packed sentence with the workflow trigger first and the payoff list second. Every clause carries information an agent needs; nothing is repeated from the title or schema.

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?

An output schema exists, so the return list need not be spelled out, and the pre-job sequencing is well covered. However, with only 2 required inputs poorly documented and no mention of quote validity, failure modes, or how the quote relates to start_training, the definition is adequate but incomplete for a pricing-gate tool.

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 only 33% and the description adds nothing about durationSeconds or epochs — neither of which is documented in the schema either. The description mentions no parameter at all, leaving half the inputs uninterpreted, so it fails to compensate for the coverage gap.

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 and resource ('quote an RVC training job') and enumerates what the quote contains (payable amount, balance, shortfall, feasibility), which clearly separates it from create_training_job and get_training_account. It stops short of naming the sibling it replaces, so a 4 rather than a 5.

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?

'Call after inspecting the audio and before creating a job' gives a concrete position in the workflow and implies the alternative (skip the quote and call create_training_job at your own risk). It never names a sibling tool explicitly and gives no explicit exclusion cases, so it is clear context without full routing guidance.

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