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

No annotations are supplied, so the description carries the full burden. It discloses the shape of what is returned and the key-based contract with submit_enquiry, but says nothing about performance, rate limits, permissions, or whether results are cached/static for a fixed enquiry.

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, front-loaded with the deliverable and followed by the actionable tie-in to submit_enquiry. No filler or redundant restatement of the title.

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?

With no output schema, the description usefully enumerates the returned field attributes, which is what an agent needs to consume the result. It is slightly incomplete in not clarifying how 'the Bank Code Lookup enquiry' is identified given the tool takes no inputs, leaving open whether other enquiries are reachable.

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 and the schema is empty, so there is nothing to disambiguate; baseline 4 applies. The description correctly conveys that the field list is not parameterized by any input.

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 names a concrete resource and enumerates its contents (key, label, type, required, help text, allowed options), so an agent knows this returns field metadata rather than data rows. It routes to submit_enquiry for the follow-up step, but it never distinguishes itself from the neighboring enquiry_describe or dataset_columns tools, which is the main ambiguity.

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?

It implies the workflow — fetch fields, then 'Pass answers to submit_enquiry keyed by field key' — which is genuinely useful sequencing guidance. However, it gives no explicit when-to-use versus enquiry_describe/dataset_columns and no prerequisites (e.g., whether an enquiry must be selected first), so usage is only implied.

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