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

With no annotations, the description carries the full burden and does: it discloses the two-step protocol, that step 1 only validates and returns a summary/consent line/token, the double opt-in via email link before any provider sees the enquiry, and the exact consent text. It also warns the person must be shown the summary and consent line.

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?

Well front-loaded with the disclaimer, then cleanly sequenced Step 1 / Step 2. The consent text is repeated verbatim from the schema description, costing some space, but overall it is tight for the amount of protocol it must convey.

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?

Complexity is high (two-phase, human-in-the-loop, consent), yet the description covers invocation sequencing, the side effect (email + provider visibility), and what step 1 returns even though no output schema exists. Nothing needed to call it correctly is missing.

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 baseline is 3, but the description adds meaning beyond the schema: it ties `answers` to field keys from enquiry_fields, explains `confirmation` is the token returned by step 1 after approval, and clarifies that consent=true encodes agreement to the quoted privacy line.

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 (submits) and resource (an enquiry to FlightDelayHQ), and immediately rules out the misreadings 'NOT a purchase, NOT a guaranteed quote'. It is clearly distinguishable from sibling read/lookup tools like enquiry_fields and enquiry_describe.

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?

Gives explicit when-to-use rules for both invocations: Step 1 with answers + consent=true; Step 2 'only if the person agrees' with the token. The gating condition for the second call is stated, not inferred.

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