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

Annotations already declare destructive=true and idempotent=false, so the safety bar is partly covered. The description adds real value beyond them: the pending-only constraint, the permission/role requirements, and the fact that the reason is retained and visible to the team. The one gap is reversibility — it doesn't say whether dismissal is permanent or undoable.

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 tight sentences, no filler. The core action and its state constraint come first, supporting detail second.

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?

A destructive, non-idempotent mutation with no output schema needs to say what the caller gets back and whether the action is reversible; neither is addressed. Permissions and the reason-retention behavior are covered, but the post-condition of a destructive operation is left open.

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% with only two parameters, so the schema already documents both, including the 500-character limit and the proposalId lookup hint. The description adds only that the reason is optional and team-visible, which is useful context but not compensating for any schema gap.

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?

Specific verb ('Dismiss') plus resource ('a pending proposal'), and the pending qualifier narrows the scope meaningfully. Implicitly contrasted with approve_training_proposal, but the description never names that sibling or list_training_proposals 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?

Conveys that only pending proposals qualify and lists who may act (owners, admins, support agents with Review agent training). Usage is implied rather than spelled out — no explicit 'use this instead of approve_training_proposal when...' guidance, and no note on whether a dismissed proposal can be re-opened.

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