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

Annotations already declare destructiveHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuine non-obvious context: the action notifies external support staff with a closing remark and requires signed-in browser approval, which is exactly the kind of side effect an agent must know before invoking.

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 front-loaded sentence that packs purpose, side effect, and precondition with zero filler.

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?

An output schema exists so return values need no explanation, and the approval precondition is stated. However, with a mutation tool whose params are fully undocumented, failing to explain confirmation_id and what 'closing remark' contains leaves an agent unsure how to complete the call.

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% and the description explains neither parameter. ticket_id is only loosely implied, and confirmation_id — presumably tied to the browser approval flow — is never mentioned, leaving the required second parameter opaque.

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 (close a support ticket) plus the side effect of sending a closing remark, which separates it from get_support_ticket and reply_support_ticket. It does not name a sibling explicitly, so it stops short of a 5.

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?

Usage is only implied: closing is the terminal action on a ticket. The one real guideline is the prerequisite 'after signed-in browser approval', but there is no explicit when-to-use versus reply_support_ticket or when not to close.

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