create_item

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

No annotations are provided, so the description carries the full behavioral burden. It only restates the required/optional field shape and says nothing about permissions, duplicate handling, side effects, or what is returned for this write operation.

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 tight sentences with the required field stated up front and no wasted wording. Well front-loaded and appropriately sized for a simple create tool.

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 mutation tool with no annotations and no output schema, the description covers shape but not behavior. The nested schema documents individual sub-fields, which partially compensates, but an agent still lacks guidance on type enum meaning, account ID semantics, and post-create behavior.

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?

The description groups the optional fields into meaningful categories ('pricing, type, and account mappings'), which maps onto costPrice/unitPrice, the type enum, and incomeAccountId/expenseAccountId. This adds some interpretive value, but the reported schema coverage is 0% at the top level and the description omits the enum values and field-level distinctions.

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 ('Create a new product/service item in KikoBooks'), which cleanly separates it from search_items/get_item/update_item siblings. It does not explicitly name an alternative, but the creation intent 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 description implies usage by naming the required and optional fields, but gives no when-to-use vs. alternatives guidance (e.g., when to create vs. update_item) or any preconditions. Adequate minimum but with a clear gap.

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