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

With no annotations, the description carries the full burden. It helpfully discloses the cost model ('1 point per returned record') and enumerates return fields, which is real added context. It nonetheless omits pagination behavior (despite start_page), rate limits, and any auth requirements.

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 dense but front-loaded sentences: purpose/filters first, then return fields and cost. Nothing is padded, though the long return-field list is slightly list-like and could be tighter.

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, enumerating the returned fields is genuinely necessary and is provided, and the point cost is disclosed. For a keyword search tool this is close to complete, with only pagination and access prerequisites left implicit.

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 nine parameters are already well documented with examples, enums and defaults. The description restates the filter set (brand, size, colour, price range, sort) without adding format or semantics beyond the schema, so the baseline 3 applies.

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 (Zalando products) plus the keyword-driven scope and filter dimensions. It is clear what the tool does, though it never names the sibling tools (e.g. run_zalando_products or run_zalando_brands_products) or explains how it differs from them.

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 via 'by keyword' and lists optional filters, giving a reasonable sense of when the tool fits. However, it offers no explicit when-to-use/when-not guidance and does not point to the sibling product tools for browsing versus searching.

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