Get Price History

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

With no annotations, the description carries the full burden, and it does disclose one genuine behavioral trait: a failure mode ('None with skip reason not_amazon'). However, it omits auth/rate-limit behavior, coverage limits of CamelCamelCamel data, and any indication of latency or failure modes beyond the non-Amazon case.

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 source and accepted inputs front-loaded; nothing is padded. The return-value fragment is telegraphic but readable.

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 lookup with an output schema present, the essentials are covered and return values need not be re-explained. What is missing is positioning against the sibling price/deal tools and any note on data source limits, which leaves the agent without routing guidance.

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 0% and the single 'asin' parameter has no description, so the schema alone would leave the agent guessing. The description compensates by stating the parameter accepts either an ASIN or an amazon.com product URL, which is real meaning beyond the structured field.

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+resource ('Amazon price history') plus the upstream source (CamelCamelCamel), which pins down exactly what is returned. It does not explicitly distinguish itself from siblings like compare_prices or get_deals, so it falls short of a 5.

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?

There is no statement of when to use this tool versus compare_prices, get_deals, or extract_product; usage is only implied by the phrase 'price history'. No prerequisites, no exclusions, no alternative routing are given.

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