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

With no annotations, the description carries the behavioral disclosure burden. It reveals that calls are admin-only, never automatic, and produce a permanent unique reference, which hints at irreversibility/idempotency. It does not state side effects, return behavior, or whether issuance can be undone, leaving important gaps.

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 short sentences with no filler. The key scoping facts are front-loaded, and every word contributes meaning.

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?

This is a nested-object mutation tool with no annotations and no output schema, so the description is too sparse to support correct invocation. It omits the meaning of the budget fields, how idempotencyKey is used, and what happens after issuance.

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 0%, so the description needed to compensate, but it does not explain the budget object, idempotencyKey, or nested fields like subsidy, operatorLimit, or reviewerLimit. 'Permanent unique reference' weakly alludes to idempotencyKey but provides no concrete parameter guidance.

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?

Purpose is stated concisely: administrator-only issuance of finite earned credits with a permanent unique reference. This distinguishes it from sibling tools like enroll_credits by emphasizing admin-only, non-automatic issuance, though the phrase 'finite earned-credit' is somewhat jargon-heavy.

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 description gives context: it is administrator-only and 'Never called automatically.' However, it does not explicitly say when to use this tool versus alternatives such as enroll_credits or revoke_credential, so usage guidance is implied rather than explicit.

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