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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered without description help. The description adds that results carry 'latest scan scores', which is genuinely useful content information, but says nothing about result volume, ordering, or whether all products are returned.

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?

A single short sentence that front-loads the action and resource, with the outcome detail trailing. There is no filler and nothing that could be trimmed without losing meaning.

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?

With no parameters, no output schema, and full annotation coverage, a one-line description is close to sufficient. A brief note on scope (all products vs. filtered) would close the remaining gap against the overlapping siblings.

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?

The tool takes zero parameters, so the baseline is 4. The description correctly implies no input is required and instead characterizes what comes back, which is the only parameter-adjacent information that could matter here.

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 pairs the specific verb 'List' with the resource 'products' and adds the payload detail 'latest scan scores', so the agent knows this is a bulk retrieval rather than a single-record fetch. It does not explicitly distinguish itself from close siblings like get_my_products_status, search_products, or compare_products, which keeps it from 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?

There is no when-to-use guidance and no mention of alternatives, even though the sibling set contains several overlapping retrieval tools (get_product for a single item, search_products for filtered lookup, get_my_products_status). The agent must infer that this is the unfiltered 'list everything' entry point.

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