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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds useful behavioral context beyond annotations: it names the aggregate outputs, states flights are ordered newest first, and specifies that aggregates are empty when there are no flights. It does not mention pagination or authentication, but the added output semantics are substantial.

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 a single front-loaded sentence with no wasted words. The list of aggregate fields is dense but necessary to convey the return shape, though the abrupt colon-list style is slightly less scannable than it could be.

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 read-only tool with one parameter and an output schema, the description covers the return composition well. However, it omits parameter semantics for aircraftId and any when-to-use guidance relative to the many sibling tools, leaving clear gaps for an agent selecting among alternatives.

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 0%, so the description must compensate for the undocumented aircraftId parameter. It does not describe the ID's format, source, or expected value at all; it only implies the tool operates on a single aircraft. This leaves the one required parameter semantically under-specified.

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 specific verb and resource: it returns all flights for an aircraft plus derived aggregates for a detail page. This clearly distinguishes the tool from siblings that return only one aggregate view (e.g., Flight_flights_by_year), but it does not name any alternative 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?

There is no explicit guidance on when to use this tool versus siblings like Flight_list_flights or Flight_flights_by_year. The phrase 'used on the detail page' is a UI context hint, not agent-facing usage criteria or exclusion conditions.

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