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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, but the description adds meaningful context: reads the public catalogue via GET requests and does not create a cart, order or payment. Because there is no output schema, the note that results include current price, stock status and a product-page link is genuinely useful disclosure beyond the annotations.

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 English portion is front-loaded and efficient: purpose, when-to-use, return contents, and read-only scope each earn their sentence. The closing Dutch sentence is a full restatement rather than new information, which is mild redundancy relative to a tight single-language description.

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 read-only, five-optional-parameter search tool with annotations covering the safety profile and no output schema, the description supplies what the agent needs: what is searched, when to use it, what the results contain, and what side effects do not occur. Nothing required for correct invocation is missing.

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 the schema already documents query, price bounds, sort enum and limit, including that an empty query returns the most popular products. The description only reinforces the subject-keyword idea and price-range filtering (and the Dutch line repeats 'onderwerp en budget'), adding no syntax or format detail beyond the schema. 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?

The description names a specific verb ("searches") and resource ("the live catalogue of DiamondPaintingWinkel.nl") with the exact object type (diamond painting kits), plus example subject terms and a price-range scope. It is unmistakably distinct from the siblings photo_size_advice and shop_info, which do not search products.

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?

"Use when someone looks for a ready-made diamond painting kit or a gift" gives a clear triggering context, and "does not create a cart, order or payment" sets a firm out-of-scope boundary. It stops short of explicitly routing general shop questions to shop_info, but the positive/negative usage conditions are otherwise clear.

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