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

With no annotations, the description carries the full burden and does substantial work: it discloses the return shape (url, mode, unlock_token), the payer_type default, fixed USD currency, disabled adaptive pricing, and the pricing model ($1 unlock, $1–$5 posts, free answers). It omits auth requirements, idempotency on repeat unlocks, and error behavior, keeping it short of a 5.

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?

The facts are present but fragmented and repetitive: '$1 poll unlock' in the opening is restated as 'Poll unlock $1' later, and the pricing sentences read as notes rather than a structured flow. It is not bloated, but it is not front-loaded cleanly either.

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 2-param tool with no output schema, the description covers the return object, defaults, currency and pricing, which is most of what an agent needs. Missing auth/permission and repeat-unlock behavior are the notable gaps.

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 description coverage is 0%, so the description must compensate. It documents payer_type's default ('Omitted payer_type is agent') and its enum semantics, but says nothing about the required slug parameter beyond what its name implies, leaving half the parameters unexplained.

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+resource ('Start a $1 poll unlock') and equates it to the sibling create_checkout, which helps an agent place it. It doesn't explicitly contrast with unlock_ask, the likely adjacent sibling, so sibling differentiation is incomplete.

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?

'Same as create_checkout' implies when this tool applies by analogy, but there is no explicit when-to-use/when-not guidance nor a direct comparison to unlock_ask. Usage is inferable rather than stated.

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