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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds only commercial policy (free previews, post-approval payment, free video wish lists) and says nothing about what a product entry contains, whether prices cover multiple formats, or how results are ordered or paginated.

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?

Three short sentences, front-loaded with the resource and currency, which is good. However, the closing sentence about video wish lists has little apparent bearing on listing song products and reads as promotional 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?

This is a parameterless read-only listing tool, so the burden is light and the description covers the resource and currency. It still leaves unclear what a 'product' comprises and why an agent would pick this over list_sample_songs, which is the main missing decision-relevant detail.

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; no parameter explanation is needed. The one semantic detail that matters, that all prices are in USD, is explicitly stated.

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 identifies the resource (Wisheroo song products) and what accompanies it (prices in USD), but never uses a verb like 'list' or 'return', leaving the operation implied by the name. It partially distinguishes from siblings like list_sample_songs and list_occasions by naming 'products', but does not state how products differ from sample songs.

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 guidance on when to call this versus list_sample_songs, list_occasions, or about_wisheroo. The pricing and payment sentences describe the business policy rather than a condition for selecting this tool.

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