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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the description is free to add value elsewhere — and it does, disclosing the shape of the returned field set, the special role of bid_critical_details as price-affecting optional questions in priority order, and the constraint that option fields accept only listed values. That last point is actionable guidance for a downstream create_request call. No return format details beyond field semantics, but nothing contradicts the annotations.

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?

Three short sentences, front-loaded with the core purpose, then the return contents, then the bid_critical_details caveat and the enum constraint. Every sentence earns its place; only mild redundancy in repeating 'from find_category' after the schema already says it.

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?

With no output schema, the description correctly carries the return-value burden by enumerating the field attributes an agent needs (type, required, options, region codes) plus the price-critical subset. Given a one-parameter read-only tool, this is close to complete; the only gap is that it never says what to do with the returned form.

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% and the single parameter is already documented as 'Category id from find_category', so the description's '(petal_id from find_category)' is largely restating the schema. Baseline 3 applies since the schema carries the parameter burden; the description adds no format, length, or sourcing detail beyond what is already there.

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 ('Returns the fields of a category') and enumerates exactly what the returned fields contain: name, type, required flag, options, region codes. It also ties itself to the find_category sibling as the source of petal_id, so an agent can place it in the workflow. It stops short of explicitly distinguishing itself from create_request/submit_request, but the read-only 'describe the form' framing is unambiguous.

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 parenthetical '(petal_id from find_category)' implies the prerequisite call sequence and hints that this is the discovery step before create_request, but no sentence states when to use this tool versus the other request siblings or when not to use it. Usage is inferable rather than spelled out.

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