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 behavior: nothing is bought/ordered/paid, no quote is guaranteed, it is free, and it returns who receives details, the consent wording, and the confirmation step. The read-only nature is implied by contrast with submit_enquiry rather than stated outright.

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 'Read first' lead is well front-loaded, but the single long sentence is wordy and stacks several negations plus a return-content list. It is functional but not 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?

There is no output schema, so the description must describe the return payload, and it does reasonably well by listing recipients, consent wording, and confirmation flow. It is complete enough for a no-param informational tool.

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 there is no parameter semantics to clarify; the baseline for a 0-param tool is 4. The description appropriately spends no effort on 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/documentation tool that returns what an enquiry involves, and it names the sibling submit_enquiry, which it is distinct from. The wording ('States plainly what submit_enquiry does') is slightly indirect about what the tool itself returns, keeping it short of a top score.

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' explicitly signals when to reach for this tool relative to submit_enquiry, giving real sequencing guidance. It does not spell out when-not-to-use or name enquiry_fields as an alternative, so it stops short of 5.

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