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

Annotations already declare the safety profile (readOnlyHint=false, destructiveHint=false, non-idempotent), so the burden is light. The description adds meaningful behavioral context beyond them: products start unpublished, payment flows to the business's own Stripe account, and files/lessons must be added by a human in the Ignix app.

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 and draft state in the first clause, then layers type semantics. The opening store/billing framing is slightly verbose but earns its place by defining the domain boundary; every sentence carries information.

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?

For a 15-parameter, no-output-schema tool this is close to complete: it describes the draft lifecycle, the type taxonomy, pricing caveats for memberships/lead magnets, and where files/lessons get attached. What is absent (response shape, per-param formats) is largely carried by the 100%-covered schema.

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 baseline is 3, but the description goes further by explaining the semantics of the type enum (download = digital files, lead_magnet = free in exchange for email, bundle = combined downloads/courses, membership = recurring) and noting that price is per-period for memberships. This meaningfully augments the terse schema field descriptions.

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 and resource ('Create a store product') and adds crucial scope: it is created as a DRAFT that nobody can buy. It also fixes the domain ('the business's own link-in-bio store in Ignix'), which separates it from the many generic create_* siblings.

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?

Gives clear context for when this applies (store administration, drafts only) and names the follow-up tool publish_store_product as the gate before anything is purchasable. It does not contrast against update_store_product or list_store_products, so an agent must infer update-vs-create for existing products.

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