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

With no annotations, the description carries the full burden and does substantial work: it discloses that nothing is bought, ordered or paid, that no quote is guaranteed, that it is free, and that it returns the recipients, consent wording, and confirmation mechanism. This is meaningful behavioral context beyond a bare read tool.

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?

Three tight sentences with the imperative 'Read first' front-loaded, followed by the substantive disclosure. Little waste, though the title and description overlap somewhat in restating the non-purchase framing.

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?

For a zero-parameter, read-only metadata tool with no output schema, the description covers what is returned (recipients, consent wording, confirmation flow) and what the tool guarantees or does not. Nothing critical to calling it is missing, though the return shape is described only in prose.

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?

The tool takes zero parameters, so per the rubric the baseline is 4. The description correctly implies there is nothing to pass, though it does not explicitly state that it takes no input.

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 names the specific subject (what submit_enquiry does on Sauna Cold Plunge Compare) and the resource (an enquiry with human providers), and enumerates the metadata it returns. It is slightly indirect since it describes its sibling's behavior rather than itself, but an agent can tell it apart from enquiry_fields and submit_enquiry.

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?

The opening 'Read first' gives explicit ordering guidance — call this before submit_enquiry — and the title/body rule out what this is not (not a purchase, not a guaranteed quote). It stops short of naming alternative siblings or naming the exact call site, so it's clear context without full exclusions.

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