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

With no annotations, the description carries the behavioral disclosure burden. It communicates that the tool is a read-only metadata listing and details the returned field attributes, which is the relevant behavior for a zero-parameter query. It could have been more explicit about the operation being a retrieval with no side effects, but nothing in the text contradicts or obscures that.

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 compact sentences carry all the essential information: the field inventory and the relationship to submit_enquiry. The content is front-loaded and every clause contributes value.

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 metadata tool, the description covers the return content and how to consume it, which is sufficient to call it correctly. It leaves the distinction from enquiry_describe implicit, but the title and tool name already hint at the difference, so this is a minor gap.

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 zero parameters and an empty input schema, so there are no parameter semantics for the description to clarify. The description correctly avoids inventing parameter details and instead focuses on the output fields.

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 clearly identifies the tool as exposing every field of the 409A Providers enquiry, enumerating the exact contents (key, label, type, required, help text, allowed options). It lacks an explicit verb like 'lists' or 'returns,' but the meaning is unambiguous and distinguishable from the sibling submit_enquiry by naming the field metadata.

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 gives clear context for use: answers should be passed to submit_enquiry keyed by the field key, which tells an agent why this metadata matters. It does not explicitly mention when-not-to-use it or name alternatives such as enquiry_describe, so it falls just short of full routing guidance.

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