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

With no annotations provided, the description carries the burden and does meaningful work: it discloses sort order (newest effective date first), an authorization requirement (owner or office with see_prices), field-level redaction (cost_minor null when costs are not visible), and how the current price is derived. It does not discuss volume limits or what happens for an item with no history, but the key behavioral facts are present.

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 sentences, each carrying distinct payload: what is returned and in what order, the permission/redaction behavior, and the rule for identifying the current price. No filler and the primary purpose is front-loaded.

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?

An output schema exists, so return-value enumeration is unnecessary, and the description still adds the ordering and cost_minor redaction semantics an agent needs to interpret the payload. The remaining gap is around the single input parameter and what an empty history looks like, but the definition is otherwise sufficient for a one-parameter read tool.

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 0% and the single parameter (item_id, uuid) is never named in the description; the phrase 'for one price book item' only implies that the input is an item identifier. No format, source of the id, or error behavior for unknown ids is given, so the description adds only marginal meaning beyond the schema type.

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 concrete resource and scope: dated price rows for exactly one price book item, newest effective date first. It is clearly distinguishable from siblings like pricebook_list (catalog listing), pricebook_stalePrices (staleness report), and pricebook_saveItem (mutation), though it never names those alternatives explicitly.

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 context is implied by the read-only history framing and the 'needs see_prices' permission note, but there is no explicit when-to-use / when-not-to-use guidance or reference to a sibling tool for related needs. An agent must infer the selection conditions.

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