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

With no annotations, the description does meaningful transparency work: it states that nothing is bought, ordered, or paid, that no quote is guaranteed, and that the action is free. It also discloses what the tool returns. It does not explicitly say this describe tool itself has no side effects, but the verb 'states' and the listed return content strongly imply a non-mutating informational operation.

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 description is compact and front-loaded: 'Read first' signals intended use immediately, the middle sentence delivers the core semantic distinction, and the final sentence enumerates the returned content. Every sentence adds distinct value without redundancy or fluff.

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 parameterless describe tool with no output schema and no annotations, the description covers the essential ground: what submit_enquiry does, the transactional caveats, and what the tool returns. It is slightly incomplete in not naming sibling tools or the output shape, but an agent can invoke this tool correctly with the information given.

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?

This tool has zero parameters and schema coverage is 100%, so there are no parameter semantics for the description to explain. Per the zero-parameter baseline, a 4 is appropriate; the description adds no parameter-specific detail because none is needed.

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 uses a specific verb ('states plainly') and identifies the resource: what submit_enquiry does on Car Import Calculator. It also lists the concrete things the tool returns (who receives details, consent wording, confirmation). It stops short of explicitly distinguishing itself from all siblings like calculator_describe, so it is clear but not fully differentiated.

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 this tool is meant to be consulted before taking action, and the wording clarifies what will and won't happen when using submit_enquiry. However, it never explicitly names alternatives such as submit_enquiry, enquiry_fields, or calculator_describe, nor does it state when not to use this tool, so the usage context is implied rather than explicit.

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