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

Annotations already flag non-read-only, non-destructive behavior, and the description adds useful context: the URL is short-lived, entitlement-gated, and the artifact is a signed .taip envelope. It does not discuss possible side effects or failure modes, but the added gating/lifetime detail goes beyond the structured fields.

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?

Single sentence with all essential facts front-loaded: the action, the returned object, its lifetime, access restriction, and artifact type. No filler or redundancy beyond the title's 'owned' being reflected as 'entitlement-gated'.

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 one-parameter tool with no output schema, the description adequately conveys the return value (short-lived URL) and the prerequisite (entitlement). It could mention error/denial behavior for unowned packs, but complexity is low enough that the description is nearly complete.

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 productId is already described as a UUID with a clear name. The description adds mild context by tying the parameter to an owned/entitled pack, but no syntax or extra meaning beyond the schema is necessary.

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 ('Return') and resource ('short-lived entitlement-gated URL for the signed .taip envelope'), clearly identifying it as a download/obtain-URL operation rather than upload/publish/run. The title's 'owned' qualifier plus entitlement-gated phrasing distinguishes it from acquisition or search 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?

The phrase 'entitlement-gated' implies use only for packs the caller owns, but the description never explicitly states when to use this over siblings like get_ai_pack_runtime_profile or run_ai_pack, nor mentions any exclusions. Usage is implied, not instructed.

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