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

Annotations already declare destructiveHint=true, idempotentHint=false and readOnlyHint=false, so the safety profile is largely covered. The description adds genuinely new context: the reason is persisted and 'kept for the team', and the operation is restricted to admins. It still doesn't say whether dismissal is reversible or what happens to the proposal record.

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?

One compact sentence that front-loads the action and scope, then adds two clauses that each carry information. No filler, no restatement of the title.

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 two-parameter, non-idempotent mutation with no output schema and annotations that already cover destructiveness, the description covers purpose, permission, and reason handling adequately. The missing piece is the post-dismissal state of the proposal, which matters given destructiveHint=true.

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%, so the schema already documents both params, giving a baseline of 3. The description adds meaning the schema omits: the reason is optional and is retained for the team to see, which tells the agent the value is user-visible rather than internal.

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 (Dismiss) and resource (a pending training proposal) plus the optional reason, which cleanly separates it from the sibling approve_training_proposal by the action taken. It does not name any sibling explicitly, so it stays at 4 rather than 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?

'pending' scopes when the action is legal and 'Admins only' states a hard prerequisite, which is real usage guidance. However, it never contrasts with approve_training_proposal or explains what to do instead if the proposal is not dismissible, so the when-not side is only implied.

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