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

With no annotations provided, the description carries the full burden. It does disclose what data is returned per field and how the output keys connect to submit_enquiry. It does not state the response container format (array vs. keyed object) or explicitly confirm this is a read-only operation, though for a parameterless metadata tool this is a modest gap.

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?

Two sentences with zero waste. The first sentence front-loads the core purpose and contents of the returned data; the second sentence adds the crucial consumption hint tying output keys to submit_enquiry. Both sentences earn their place.

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 low-complexity parameterless tool with no output schema, the description covers what is returned and how to use the returned keys. The main omission is not addressing the sibling enquiry_describe, which could leave an agent uncertain about which tool to select.

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 has 0 parameters, which sets a baseline of 4 per the rubric. No parameter documentation is needed, and the description correctly focuses on the output rather than inventing parameter semantics.

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 identifies the exact resource ('Every field of the Concrete Pumping Hire enquiry') and enumerates precisely what each field entry contains: key, label, type, required status, help text, and allowed options. The only gap is the absence of an explicit verb (list/get/return) and no direct differentiation from the similarly named sibling enquiry_describe.

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 second sentence provides actionable guidance: 'Pass answers to submit_enquiry keyed by field key,' which implies this tool is a prerequisite for submitting an enquiry. However, there is no explicit when-to-use/when-not-to-use statement and no guidance on how enquiry_fields differs from enquiry_describe.

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