Get download link for a purchased item

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

No annotations are provided, so the description carries the burden. It discloses that the URL is time-limited and requires a specific permission token, but does not mention potential error states (e.g., item not purchased, expired token) or whether the operation is idempotent/read-only. The description adds some useful context beyond the schema, but more detail would improve transparency.

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 description is two sentences, front-loaded with the main purpose. Every word is informative with no filler or tautology.

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 simple tool with one parameter and no output schema, the description is adequate but missing information about the return value (what the download URL looks like, format). It could also mention that the URL expires. Given the low complexity, it is not severely incomplete, but there is room for improvement.

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?

The input schema coverage is 100% with a clear description for item_id. The tool description does not add additional semantics about the parameter beyond what the schema provides (e.g., format, range). Per the guidelines, with high coverage, a baseline of 3 is appropriate.

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 clearly states the verb 'Get' and the specific resource 'download URL for a purchased item'. It also specifies that the URL is time-limited, providing precise scope. This distinguishes it from sibling tools like envato_list_purchases (listing purchases) and envato_verify_purchase (verifying purchase status).

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?

The description mentions a prerequisite ('requires a token with download permission') but does not discuss when to use this tool versus alternatives (e.g., checking purchase eligibility via envato_list_purchases first), nor does it state when not to use it.

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