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

Adds real behavioral context beyond the annotations: exactly what data is transmitted to a third party, that a specialist replies by email, that no payment is taken and no booking is created, plus a privacy link. It does not clarify what happens on duplicate submissions or idempotency, which the non-idempotent annotation leaves ambiguous.

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?

Front-loads the action, then elaborates on follow-up and the no-payment guarantee, ending with the privacy link. Slight redundancy between the follow-up sentence and the email parameter description, but no wasted fat.

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?

With no output schema and seven parameters, the description covers the essentials: intent, data sent, expected follow-up, and the no-payment/no-booking caveat. Missing only edge-case behavior such as duplicate submissions or validation failures.

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 baseline is 3. The prose enumerates the fields sent (route, date, passengers, notes), but adds no format or validation detail beyond what the schema already documents.

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 and resource: 'Submit a charter flight booking request to SkyAccess.' It clarifies the nature of the operation (an enquiry, not a confirmed booking), which distinguishes it from get_charter_estimate and search_empty_legs at a glance.

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?

Explains the context clearly: use this to start an enquiry so a specialist can follow up on availability and pricing, with no payment involved. It does not explicitly name the sibling alternatives (e.g. get_charter_estimate, booking_handoff) or state when not to use it, so it falls short of full routing guidance.

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