get_item

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

No annotations provided, so the description carries the full burden. It discloses that it returns 'full item details including pricing and account mapping', which is genuinely useful context about the return shape even absent an output schema. But it doesn't state error behavior (e.g., non-existent ID), auth/permission needs, or whether it's read-only — though a 'Get' strongly implies read-only.

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 sentences, no waste, front-loaded with the verb+resource+scope. Every phrase earns its place, with return content disclosed second.

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 one-parameter read tool this is nearly sufficient, but with no annotations and no output schema, the description is the only source of behavioral info yet omits error handling and permission requirements. Return content is partially described, which helps.

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 100% — the single item_id parameter is fully documented in the schema as 'The Item ID to retrieve'. Description adds no parameter specifics beyond restating that ID is required. Baseline 3 when schema does the heavy lifting.

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 (Get) and resource (single product/service item by ID from KikoBooks). Clearly distinguishes from sibling search_items (search vs single fetch), though it doesn't explicitly name the alternative like the highest-scoring examples do.

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?

Usage is implied — retrieve one item when you have its ID. However, no explicit when/when-not guidance and no mention of search_items as the alternative for listing/finding items without an ID. Adequate but with clear gap.

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