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

Annotations already declare destructiveHint=true and readOnlyHint=false, and the description adds context the annotations do not: the file is removed from the active list and remains restorable via the UI. That reversibility detail materially changes how an agent should treat the operation. It does not state auth requirements or idempotency, so it is not 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?

Two brief sentences with the action front-loaded and the behavioral note second; no filler. It is close to minimal but the second clause is the most valuable part of the definition.

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 single-parameter mutation with annotations covering the safety profile, the essentials are present, but there is no output/response description, no mention of whether a corresponding unarchive path exists (which the sibling list lacks), and no permission context.

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?

Only one parameter exists and the schema itself documents it as "The UUID of the attachment to archive" with a UUID pattern, so the schema carries most of the meaning. The description adds nothing about the identifier, leaving the low reported schema coverage uncompensated, but there is little room to add value for a single well-typed field.

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?

"Archive a file attachment" gives a specific verb plus resource, and the resource (attachment) is distinguishable from the sibling archive-template and archive-custom-template tools. It stops short of explicitly telling the agent how it differs from those siblings, but the noun is unambiguous.

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?

There is no guidance on when to archive versus doing something else, no mention of prerequisites, and no reference to any alternative tool. The agent must infer the trigger condition entirely, which is a clear gap for a mutation tool.

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