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

No annotations exist, so the description carries the full burden and mostly meets it: it discloses validation on the first call, the returned summary/consent line/token, that the person must click an emailed link before any provider sees the data, and that details go to up to three named contractors with per-firm notification and opt-out. It does not cover failure modes (e.g. what happens if validation fails or the token expires), which is the remaining gap.

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-loaded and dense with necessary workflow detail, with the two steps clearly sequenced. The only waste is the consent wording, which is quoted verbatim in the description and repeated near-identically in the schema's consent property.

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 annotations and no output schema, the description compensates well by describing what Step 1 returns (summary, consent line, token) and what the person receives (an email confirmation link). It is complete enough to drive both calls, with only error/edge-case handling left unaddressed.

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 a baseline of 3 applies, but the description adds real value beyond the schema by tying each parameter to a specific call: answers+consent on Step 1, and confirmation token reserved for Step 2. It also spells out the meaning of consent rather than just its type.

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?

Names a specific verb and resource ('Submits an enquiry to Three Phase Cost') and immediately disambiguates scope with 'NOT a purchase, NOT a guaranteed quote.' It also points at the sibling that supplies the field keys ('keyed by field key from enquiry_fields'), so an agent can place it in the workflow without opening another schema.

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?

States the exact two-step protocol: Step 1 call with answers + consent=true to validate, and Step 2 only if the person agrees, with the same answers plus the confirmation token. The conditional that gates Step 2 is explicit, so there is no inference required about when to call.

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