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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds genuinely new context beyond those flags: the delivery log is deleted along with the alert (a cascade side effect not implied by destructiveHint alone), and the return payload is stated as {deleted: id}, which matters because no output schema exists.

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 no filler: the action, the cascade consequence, and the return shape, in that order. Nothing is repeated from the title or schema and nothing is wasted.

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 destructive tool with no output schema, the description covers the action, the side effect, and the response shape — the three things an agent most needs. It stops short of mentioning authorization requirements or whether deletion is recoverable, which is a minor remaining gap.

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 100% and the single id parameter is documented with format, max length, and an example value. The description says only "by id," adding no syntax or sourcing detail beyond the schema, so the baseline 3 applies.

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?

"Delete one alert by id" gives a specific verb (delete), a specific resource (alert), and scope (one, by id). An agent can immediately distinguish it from update_alert, list_alerts, and subscribe_alert without opening any schema.

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?

The description states what it does but never says when to reach for it versus alternatives such as update_alert (modify) or list_alerts (inspect). The id's provenance is documented in the schema, not here, and no prerequisites, permission requirements, or exclusions are mentioned.

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