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

Annotations already declare readOnly/idempotent/non-destructive, so the description's added value is the auth requirement, the bundle-item inclusion rule, and the note that file indexes feed into get_download_url. It does not say how paging behaves or whether a total count is returned, which is the remaining behavioral gap.

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 dense sentence that front-loads the verb, owner scope, and returned data, with the auth prerequisite last. Every clause carries information; no filler.

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 output schema, the description carries the return-shape burden well by listing product id, name, product page, files with index, download availability and install requirements. The missing piece is pagination semantics for the two undocumented paging parameters.

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 only 33% — only locale is documented — yet the description says nothing about page or limit, including that they are bounded (max 100/50) and default to 1/25. With below-half coverage the description needed to compensate for the undocumented pagination parameters and does not.

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 definition gives an explicit verb plus resource ('Lists the RPScripts products the signed-in customer owns') and scopes it to active purchases including bundle items, which separates it from catalog-browsing siblings like search_products and list_categories. It even enumerates the returned fields, so an agent knows exactly what it gets.

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 scope statement ('the signed-in customer owns') plus the prerequisite 'Requires signing in to RPScripts' gives a clear condition for use. It stops short of explicitly naming alternatives (e.g. use search_products to browse the full catalog) or stating exclusions, so it is not a 5.

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