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

Annotations cover safety flags (readOnly=false, destructive=false, idempotent=false, openWorld=false), so the bar is lower, yet the description adds real context: the preview is owner-bound, it reports counts of unscored responses, it leaves release status untouched, and it warns that the eventual release is irreversible. It does not clarify the lifetime/expiry of the preview token or who may approve it, keeping it at a solid 4 rather than 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?

Three short sentences with the core action front-loaded and no filler. The middle sentence slightly restates the preview semantics already implied by sentence one, but the closing irreversibility warning earns its place.

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 not be explained, and the description covers the key non-obvious facts an agent needs (no status change, unscored counts included, owner binding, irreversibility). Only the relationship to the confirm sibling and the approval subject 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?

There is a single parameter, assignmentId, and the schema documents it at 100% coverage including its own pointer to list_coursework. The description adds no syntax, format, or sourcing detail beyond that, so it meets the baseline rather than exceeding it.

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: 'Creates an owner-bound confirmation preview for releasing assignment scores and feedback to every class.' The scope ('every class') and the preview nature clearly separate it from a plain release action. It stops short of naming the sibling confirm_release_results that executes the preview, so differentiation is implied rather than explicit.

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?

'Release status remains unchanged until approved preview execution' implies this is the pre-step in a two-phase flow, and an agent can infer that confirm_release_results follows. However, it never explicitly says when to use this tool versus that sibling, nor what qualifies an approver, so usage is inferred rather than stated.

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