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

The readOnlyHint annotation already establishes that this is a safe read operation. The description adds useful behavioral context by saying results include lowest verified dealer prices and multi-dealer offer counts. However, it does not disclose pagination behavior, result ordering, or limits beyond what the schema covers.

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?

The description is a single well-formed sentence with zero wasted words. The core purpose and catalog scope are front-loaded, and the additional result-value context is packed efficiently into the same sentence.

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 usefully indicates that results include lowest verified dealer prices and multi-dealer offer counts. The input schema is fully documented and annotations cover the safety profile. It could still say more about result ordering or pagination, but it is broadly complete for a search 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 100%, so all five parameters are already documented in detail. The description reinforces the catalog scope by mentioning metals and product formats, but adds no parameter-level semantics beyond the schema. The baseline score of 3 is appropriate.

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 uses a specific verb-plus-resource phrase: search and filter OunceScout's canonical bullion catalog. It names the metals and product formats covered, so the agent knows the catalog scope. It does not explicitly differentiate this tool from siblings like compare_product_dealers, which keeps it from 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?

The description implies usage by stating that the tool searches and filters the catalog, but it gives no explicit when-to-use guidance. It does not name alternatives or clarify when to prefer this over compare_product_dealers or get_live_spot_prices. Usage is therefore only implied rather than directed.

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