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

Annotations only declare the safety profile (openWorld, non-idempotent, not read-only), while the description supplies the valuable details: an upload to R2 and a time-limited signed download URL, plus the ZIP's contents. Auth and setup requirements are disclosed with a link. Cost/credit or failure behavior is not mentioned, keeping it below 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?

Auth requirement is front-loaded, then artifact behavior, then the disambiguation against the full themed artifact. The editorUrl mention is a little verbose but earns its place as a redirect instruction.

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 must convey the return value, and it does (signed download URL, ZIP contents). Auth, setup link, and artifact-scope caveat round it out; only workflow timing and cost expectations are left implicit.

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% for the single projectId parameter and the schema already ties it to create_overlay_pack. The description adds no syntax or format detail beyond what the schema provides, so the baseline 3 applies.

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 and resource ("Bundles the pack's finished scenes into a flat ZIP") and explicitly names the artifact it is not (the full themed folder-tree from the web editor). An agent can distinguish it from sibling status/creation tools without opening the schema.

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?

Gives a clear precondition (approved AlertForge account, OAuth flow) and an explicit exclusion pointing the user to the web editor's "Download pack" button for the richer artifact. It stops short of saying when in the workflow to call it (e.g., after get_pack_status reports completion), so it's clear but not exhaustive.

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