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

With no annotations available, the description carries the full behavioral burden and does so excellently. It discloses the paid nature, tiered fee schedule, operator review, no-refund policy, and the payment flow (checkout_url vs. immediate settlement with SPT token). This is substantial transparency for a mutating financial action.

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 compact and front-loaded: the first sentence states the purpose, and each subsequent sentence adds one essential fact (fees, review/refund, payment return). No filler or repeated schema information.

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?

Despite having no output schema or annotations, the description provides all critical operational context: cost model, review process, refund policy, and return behavior. Together with the fully described parameters, this is complete enough for an agent to invoke the tool correctly.

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?

All five parameters are fully described in the schema, giving a baseline of 3. The description adds extra semantics for proposed_path (fee scales with path depth) and spt_token (settles immediately instead of returning a checkout_url), which goes beyond the schema and justifies a higher score.

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 clearly states the action ('Propose a new category') and the resource ('taxonomy node for the catalog'). It distinguishes this creation tool from sibling listing tools like list_categories and list_my_category_proposals by emphasizing the proposal/payment/review flow.

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 contextual guidance: this is a paid action with operator review and no refund, which implies it is for creating new categories rather than listing existing ones. However, it does not explicitly name alternatives or state when not to use it, so it stops short of full exclusions.

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