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

With no annotations, the description carries the full burden and does disclose useful traits: non-spending behavior, one-time key return ('returns agent_api_key once'), and a conditional unlock_token for page_draft_long. It omits polling cadence, timeout/not-yet-settled behavior, and any auth or rate-limit context.

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 core action and completion condition, followed by the return contract and the non-spending reassurance. Nothing is padded, though the terseness leaves gaps that could have been filled cheaply.

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 no-annotation, no-output-schema tool the description does convey the key return values (agent_api_key once, unlock_token conditionally). It stops short of explaining what the agent sees while still unsettled or how the duplicated payment parameters relate, which an agent needs to call this correctly.

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 0% and the description mentions no parameters at all, leaving provider, paymentId, and payment_id undocumented. The near-duplicate paymentId/payment_id pair is especially risky with no guidance on which to supply or how they differ.

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 (poll) and resource (agent checkout) with the completion condition 'until settled'. It is clearly distinct from launchfiles_billing_create_checkout, though it does not explicitly contrast itself with the similarly named sibling launchfiles_poll_agent_key.

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 implied (poll after creating a checkout) rather than stated, and no alternative tool is named. The clause 'Does not spend' does help separate it from a creating/purchasing call, but the agent must infer the when-to-use step from sibling names alone.

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