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

Annotations already declare readOnlyHint, idempotentHint, non-destructiveHint and closed-world scope, so the safety profile is covered. The description adds nothing beyond what the schema already lists (the filter facets) — no ranking, pagination, result-cap, or empty-result behavior.

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?

A single short sentence with the key facets front-loaded and zero filler. It is efficient, though arguably too terse to carry the routing information the tool needs.

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?

Output schema and annotations are rich, so return values and safety need no explanation. But the schema's anyOf constraint (at least one of query or brand required) is not surfaced in the description, and the sibling overlap with 'search' is unaddressed — meaningful gaps for a 6-parameter 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 each parameter is already documented with type, bounds and Croatian explanations; baseline 3 applies. The description merely restates the facet list and adds no syntax, unit, or interaction detail (e.g. how min/max_price combine).

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 (search) and resource (products) plus the filter dimensions (keyword, brand, price, availability), so the agent knows exactly what the tool returns. However, it never distinguishes itself from the sibling 'search' tool, leaving a real ambiguity about which search entry point to pick.

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 when-to-use guidance, no exclusions, and no mention of the sibling 'search' tool. The agent must infer from the name alone that this is product-scoped while 'search' is generic.

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