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

With no annotations, the description carries the full burden and does meaningful work: it discloses that nothing is bought/ordered/paid, that no quote is guaranteed, that it is free, and that it returns recipient details, consent wording, and confirmation method. It does not explicitly assert read-only status beyond the 'Read first' framing, so it falls just short of full behavioral disclosure.

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?

The imperative 'Read first' is front-loaded, followed by a compact statement of scope and returns. The clause 'Nothing is bought, ordered or paid; no quote is guaranteed; it is free' is slightly repetitive but each element guards against a distinct misinterpretation.

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 tool with no output schema, the description helpfully previews what is returned (recipient of details, consent wording, confirmation method), compensating for the missing output schema. It is complete enough to invoke correctly, though the sibling relationship with enquiry_fields is left unexplained.

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 the baseline is 4. There are no parameters whose semantics could be clarified or omitted, and the description correctly adds nothing extraneous about inputs.

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 makes clear this is a read-only informational tool that explains the enquiry flow ('Read first. States plainly what submit_enquiry does...') and names the sibling it documents. It distinguishes itself from submit_enquiry by clarifying that nothing is purchased, but it never mentions the other sibling enquiry_fields, leaving some ambiguity about its scope among the three tools.

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?

'Read first' gives an implied ordering cue that this should be consulted before submit_enquiry, which is useful. However, there is no explicit when-to-use/when-not statement and no routing to enquiry_fields, so the agent must infer the remaining usage boundaries.

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