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

Beyond the annotations (readOnlyHint=false, openWorldHint=true, destructiveHint=false), it discloses the free-unlock-first logic, that the agent returns a $9.99 Stripe link the USER must personally open and pay, and that Studio subscribers are already unlocked. It also mandates user confirmation, which is essential behavioral context for an open-world paid action.

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, each carrying distinct information, with the action and outcome front-loaded and the consent requirement placed last as a directive. 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 covers both possible outcomes (immediate unlock vs. returned checkout link) and the subscriber bypass, so an agent knows what it will get back and what to do next. Nothing needed to invoke this correctly is missing.

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% and there is a single required parameter already documented as 'set_id returned by design_set'. The description adds no parameter detail, which is the expected baseline when the schema does the work.

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 states a specific verb and resource ('Unlock clean, full-resolution files for a set') and pins down exactly what unlocking produces. It is immediately distinguishable from siblings like design_set, edit_set, and export_set.

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?

It gives clear context for use: try a free unlock if available, otherwise the paid checkout path, and 'Ask the user before calling' sets the consent gate. It does not name alternative tools, but no sibling competes for this action, so the guidance is effectively complete.

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