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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds real value beyond them by clarifying that the tool yields a resource link rather than inline bytes and that a second call (resources/read) is needed to obtain content — a non-obvious two-step behavior. It omits failure modes for bad slug/versionId, which keeps it off 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?

A single compact sentence with the outcome front-loaded and the consumption step attached. There is no filler and nothing an agent must read twice.

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?

It handles the return value well for a tool with no output schema, explaining that a resource link comes back and how to dereference it. However, with two required, entirely undocumented parameters and no mention of errors or limits, the definition is not fully sufficient for correct invocation.

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 carries the full burden for two undocumented required parameters. It hints that the version is identified somehow ("a version's files"), but never explains what slug denotes or how versionId relates to it, leaving the agent to guess formats and provenance.

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: returns a resource link to a version's files packaged as a ZIP. This implicitly separates it from preview_version and list_versions, since it produces a downloadable archive rather than a preview or listing, though it never names an alternative explicitly.

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 follow-up instruction ("read it with resources/read"), which is a useful workflow cue, but offers no guidance on when to choose this over preview_version or restore_version, and no prerequisites or error conditions are stated.

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