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

With no annotations, the description carries the full burden and does disclose meaningful non-obvious behavior: the action is free, nothing is bought or paid, and no quote is guaranteed. It also previews the returned content (recipient details, consent wording, confirmation method). It stops short of stating explicitly that the tool itself is read-only and non-mutating.

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?

'Read first' is well front-loaded, but the body is a single sprawling sentence and the no-cost point is stated three times (title 'not a purchase', 'Nothing is bought, ordered or paid', 'it is free'), which is redundant rather than tight.

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 adequately covers what the agent will receive (who gets the details, consent wording, confirmation flow) and the key expectation (no purchase, no guaranteed quote). Little is missing 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?

The tool takes zero parameters, so the schema is definitionally complete and the baseline is 4. There is nothing parameter-related for the description to add or omit.

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 what submitting an enquiry entails, and its title ('not a purchase, not a guaranteed quote') sharpens the contrast with submit_enquiry. It is slightly indirect because it defines itself by describing another tool's behavior rather than stating its own output up front.

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' implies the intended ordering relative to submit_enquiry, which is useful sequencing guidance. However, it never explicitly says when to use this versus enquiry_fields, and gives no explicit when-not conditions.

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