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

With no annotations, the description carries the full burden and does so well: it discloses the two-phase write, that step 1 validates and returns a summary/consent line/token, that the enquiry is only submitted at step 2, and that the person must click an email link before any provider sees it. It omits error/idempotency behavior and any permission or rate-limit constraints, which keeps it from a 5.

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?

Relatively long, but front-loaded with the critical 'NOT a purchase' framing and organized strictly by step, so no sentence is filler. The embedded consent sentence is verbatim text that must be reproduced, which justifies its length.

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?

No output schema exists, so the description must describe returns, and it does: step 1 returns a summary, the consent line and a confirmation token. Combined with the gated email-verification flow, an agent has everything needed to drive both calls correctly.

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 the baseline is 3, but the description adds real meaning beyond the schema: it ties 'answers' to field keys from enquiry_fields and explains that 'confirmation' is the token produced by step 1 rather than an arbitrary string. The consent=true spelling of the boolean is also made operational.

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 ('Submits an enquiry to Wen Receipts') and immediately scopes it against the obvious misreadings ('NOT a purchase, NOT a guaranteed quote'). This distinguishes it from the listing_pay_* and claim_* siblings without needing to open their schemas.

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 step-by-step when-to-use: step 1 with answers + consent, then step 2 only 'if the person agrees' with the token. It names the exact conditions that gate each call and what must be shown to the person in between, which is more than most definitions provide.

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