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

Annotations already cover readOnly, idempotent, non-destructive and closed-world, so the bar is lower; the description still adds genuine context by disclosing that only already-published and immediately playable products are returned (i.e., drafts are effectively invisible) and that usage instructions ship with the response.

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?

Two short sentences, zero padding, with the visibility constraint front-loaded before the return-content note. Nothing to trim.

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 and rich annotations, the description needn't explain return values, and it doesn't. It is nearly complete for a one-parameter lookup; the only omission is what happens when the slug is unknown or unpublished (error vs. empty result).

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?

There is only one parameter and the schema documents it fully (100% coverage, including pattern and maxLength), so the schema does the heavy lifting. The description's 'public slug' phrasing confirms meaning but adds no format or failure-mode detail beyond the schema.

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?

Stated as a specific verb (fetch/get) on a specific resource (a LifeVerse product) with a clear scope: public slug, published and immediately playable. The singular-by-slug framing implicitly separates it from lifeverse_list_products and lifeverse_search_products, but neither sibling is named.

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 only implied — an agent can infer it should call this when it already has a slug rather than a query. There is no explicit when-to-use vs. when-to-use-search/list guidance and no stated prerequisites.

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