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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds useful behavioral context beyond annotations by noting that results are 'not medically interchangeable' and that the user must be consulted before replacement, which prevents misuse. It does not describe output structure or ordering, keeping it at a 3.

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 three short sentences with the purpose front-loaded. Every sentence earns its place: the primary function, the safety caveat about non-interchangeability, and the instruction to ask before replacing. There is no filler or redundancy.

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?

The tool has four parameters, all undocumented in the schema, and no output schema, but the description does not explain how results are generated, what 'available' means, how limit applies, or the relationship between product_id, region_id, and country. The caveats are useful, but operational details essential for calling the tool correctly are 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 0%, so the description must compensate, but it provides no explicit meaning for any parameter. 'Same catalog type or category' only faintly suggests that product_id is the reference item; country, region_id, and limit are entirely unexplained. The tool has three UUID parameters and a limit that an agent cannot confidently populate based on this definition.

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 states a specific verb ('Suggest') and resource ('available products with the same catalog type or category'). It clearly differentiates from sibling tools like product_details and products_search by focusing on analog/similar products rather than general search or single-product lookup, though it doesn't explicitly name those alternatives.

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 conveys a clear use case: finding alternative products of the same catalog type or category. It also provides a behavioral instruction ('Ask before replacing an item') that implies the agent should get user consent before acting. However, it does not explicitly say when to avoid this tool or name alternatives such as products_search, so the guidance is implicit rather than explicit.

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