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

The description adds behavioral context beyond the annotations: it notifies by email, requires authentication, and depends on the flight already being in the database. While annotations already show this is a non-read-only, non-idempotent write, the description enriches that with the creation and notification mechanism.

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?

The description is tight and well structured: the core purpose comes first, supported by preference examples, then prerequisites. Every sentence adds useful information and there is no filler or redundant restating of the tool name.

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 create-type tool with no output schema and six parameters, the description plus the fully documented schema gives an agent enough to invoke it correctly: purpose, notification behavior, authentication, and a prerequisite. It does not specify the response shape or duplicate-alert behavior, but those are secondary for initial invocation.

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%, so the schema already documents every parameter including formats, constraints, and conditional requirements. The description only restates high-level preference categories already visible in the enum, adding no extra per-parameter semantics, so the baseline 3 is appropriate.

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?

The description states a clear verb and resource: create a seat alert for a specific flight that emails on a matching seat. It distinguishes itself from sibling tools such as delete_seat_alert, list_seat_alerts, and search_flight by describing the alert-creation action and its triggering condition.

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 gives concrete usage context: authentication is required, the target flight must already exist, and search_flight should be used first when needed. It does not explicitly list exclusions or when-not alternatives, but the prerequisite guidance is direct and actionable.

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