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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds only the V3 endpoint path, which is redundant with the read-only hint, and says nothing about behavior when an id matches nothing or when the API returns a non-200.

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 short sentences with the operational constraint front-loaded ahead of the endpoint detail. The trailing 'V3 API. GET /api/v3/...' is largely redundant with the annotations and is the one part that does not clearly earn its place.

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 simple read-only lookup with a fully documented three-field schema, no output schema, and annotations covering safety and openness, the description supplies what an agent needs to call it. Returned product fields and not-found behavior are unstated but are minor given the tool's low complexity.

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 100%, so the baseline is 3, but the description adds a real constraint the schema cannot express: all three id parameters are optional and unconstrained by any oneOf, yet the description states exactly one must be supplied. That is genuine semantic value beyond the schema.

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: find one product by a platform id. It implicitly distinguishes a keyed lookup from the sibling list_products and get_product, though it never names those siblings explicitly, so differentiation is left partly to inference.

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 parenthetical 'give exactly one' gives a usable calling constraint, but there is no statement of when to prefer this over stamped_get_product, stamped_lookup_order-style siblings, or stamped_list_products. Usage is implied rather than routed.

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