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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered; the description adds value beyond that by disclosing pagination and the exact return shape (include/exclude state, merged vs. separate storeOverrides/feedOverrides, stock, tags, variant SKU/barcode/price/weight, API-feed Google status). It does not cover default page size behavior or limits, but with annotations present this is solid context.

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?

Front-loads the core action ('List products a feed covers, paginated') and every clause thereafter enumerates a distinct returned field or the filter options, so little is wasted. The single run-on sentence plus trailing fragment is dense but not padded.

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 an output schema present the return format needn't be explained, yet the description still describes it, and annotations plus full parameter documentation leave no operational gaps. The only shortfall is the absence of sibling-routing guidance for a large 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?

Schema coverage is 100%, so all five parameters are already documented in the schema. The description only restates the filter enum values (all | excluded | customized) and adds no format or semantic detail beyond that, so the baseline 3 applies.

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 (List) and resource (products a feed covers) and enumerates exactly which fields are returned, so an agent can distinguish it from siblings like list_section_products or list_product_issues. The scope is unambiguous without opening the schema.

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?

Usage is implied via 'products a feed covers' and the filter enum, but there is no explicit when-to-use guidance or routing against alternatives such as list_section_products or get_feed. The filter hint duplicates what the schema already states rather than adding selection logic.

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