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

No annotations are provided, so the description carries the full behavioral burden. 'Compare' implies a read-only operation, but the description does not state whether the tool is read-only, whether it has side effects, how many generators are allowed, or what the response includes beyond 'key specs and price.'

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 description is a single front-loaded sentence with no filler. It communicates the action, scope, and comparison criteria efficiently.

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 low-complexity tool with one parameter, the description gives enough to understand the basic operation and the dimensions compared. However, with no annotations or output schema, it remains thin on return format, limits, and how generator identifiers should be supplied.

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 0%, so the description must add meaning beyond the bare 'names' array. It does add a meaningful constraint by saying 'two or more generators,' implying the array should contain at least two identifiers, but it does not clarify identifier format, maximum count, or duplicate handling.

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 uses a specific verb ('Compare'), resource ('generators'), scope ('two or more'), and comparison dimensions ('key specs and price'). It is clearly distinct from single-item tools like get_generator, though it does not explicitly name sibling tools or contrast itself with 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 intended use is implied by 'Compare two or more generators side by side,' which signals multi-item comparison rather than lookup or search. However, it gives no explicit when-to-use guidance, no exclusions, and no pointer to alternatives such as search_generators or get_generator.

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