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

With no annotations, the description carries the full behavioral burden and does so: it discloses that step 1 is non-committal validation returning a summary/consent line/token, that step 2 actually submits, that an email link must be clicked before any provider sees the data, and that contact details go to up to three advisers with a stop mechanism. This is exactly the context an agent needs to avoid an unintended submission.

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 with the most decision-relevant fact (not a purchase) and structured as Step 1 / Step 2. The one inefficiency is the full consent sentence, which is quoted verbatim here and again in the consent parameter's schema description, so it is mildly redundant.

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?

There is no output schema, so the description must explain returns, and it does: a summary, the consent line, and a confirmation token from step 1, plus the post-submission email/click gate. Combined with the nested answers object, the description is complete enough for correct invocation.

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: 'answers' is keyed by field key from enquiry_fields, consent=true is tied to a specific agreement, and the confirmation token is identified as the artifact returned by step 1. That clarifies how the parameters are sequenced across the two calls, beyond the schema's static types.

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 (submits) and resource (an enquiry to CASP Checklist), and immediately disambiguates with 'NOT a purchase, NOT a guaranteed quote' and 'to human providers'. It also names the sibling enquiry_fields as the source of field keys, so an agent can place it against alternatives without opening 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?

It gives an explicit two-step protocol: Step 1 with answers+consent=true to validate, Step 2 only 'if the person agrees' with the same answers plus the confirmation token. The gating condition and the pre-requisite (person has read and agreed to the consent text) are both spelled out, leaving nothing to inference.

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