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

Beyond the annotations, the description discloses that this is a spending authorization constrained by budget, per-order cap, and expiry, and that it requires the 'billing:authorize' scope. It still does not explain terms acceptance, idempotency behavior, or what authorization result is produced, but the annotations already cover the basic safety profile.

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?

The description is two sentences, front-loaded, and free of repetition or filler. The scope prerequisite is included without bloating the definition.

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 seven-parameter authorization tool with low schema description coverage and no output schema, the description covers the central purpose and key spending constraints but omits important context around terms acceptance, idempotency, and the resulting authorization. It is minimally viable but not complete.

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 very low at 14%, so the description must carry more weight. It usefully maps the core concepts of budget, cap, expiry, and named board offers, and implies the target agent, but it does not clarify accept_terms or the full offer enum, and only partially compensates for the undocumented parameters.

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 states a specific action: letting one agent spend prepaid credit on named board offers (passes/time) under budget, cap, and expiry constraints. It is clear enough to understand the operation, but it does not distinguish itself from nearby siblings such as authorize_credit_spending, authorize_board_post_time, or buy_board_pass.

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 an operational prerequisite, requiring scope 'billing:authorize', and implies this is used to grant an agent spending permission for board offers. However, it does not say when to use this instead of related authorization or purchase tools, nor does it give exclusions or alternatives.

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