hac_site_list

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

No annotations are supplied, so the description carries the full behavioral burden, and it only implies read-only through "Lists all." It says nothing about permissions, pagination, cost, or whether the language setting alters results. Only the enumeration of returned fields adds real information.

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 first sentence is dense and front-loaded with the resource and its fields, which is good. The second sentence is promotional framing that does not earn its place as tool-selection guidance.

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?

Because an output schema exists, the description need not explain return values, and for a simple read-only lister the field enumeration is adequate. The gaps are the undocumented lang parameter and the absence of any when-to-use context against a 27-tool sibling set.

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?

There is one parameter (lang, default "zh") with 0% schema description coverage, and the description never mentions it. The unusual default makes the omission significant, since an agent cannot tell whether lang filters the response, localizes labels, or does nothing.

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 ("Lists") and a specific resource ("CMSSites in the SAP Commerce instance") and enumerates the fields returned, which clearly separates it from siblings like hac_library_list or hac_promotion_list. It does not explicitly name or contrast with any alternative, so it stops short of a 5.

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 closing line ("Essential for enterprise multi-brand group governance") gestures at a domain but gives no trigger conditions, prerequisites, or alternatives to consider. An agent gets no guidance on when to call this versus hac_library_list or hac_status.

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