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

With no annotations at all, the description carries the whole burden and it does disclose non-obvious traits: an auth prerequisite, a per-call cap of 10, and the attribution consequence. It says nothing about invalid/non-AliExpress URL handling, whether the call is idempotent, or how results map back to inputs, which leaves real gaps for a zero-annotation tool.

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?

Three sentences, front-loaded with the core transformation, then the mandatory-usage rule, then the prerequisite. No filler and nothing buried.

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 2-parameter tool with no output schema, the description covers purpose, quota, auth, and usage timing. The one gap is the return shape — whether it returns a list of links keyed to inputs — which the agent must guess since no output schema exists.

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 both parameters are already documented, including the default short link and the 0/2 enum. The description only restates the 10-URL cap and adds no further meaning for link_type, so it matches the baseline rather than exceeding it.

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 both ends of the transformation: 'Convert any aliexpress.com product/shop/search URL(s) into YOUR affiliate-attributed link(s)'. The scope (max 10 per call) and accepted input domains are stated, which makes it unmistakable against siblings like search_products or product_detail.

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?

'ALWAYS run items through this before presenting a buy link' gives an explicit, actionable trigger for use, and 'Requires a free API key' flags the prerequisite. It lacks an explicit when-not or a named alternative (e.g. the key-minting tool), so it stops short of full routing guidance.

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