dubai_gold_rate

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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description adds genuinely useful context beyond that: no API key required, the publishing cadence (09:00/13:30/18:00 UAE), and the authoritative source (Dubai Jewellery Group / Dubai City of Gold).

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?

Three tight sentences, front-loaded with the core answer and each adding distinct value (scope, source/cadence, disambiguation). No filler, though the parenthetical '(no key)' reads slightly tacked-on.

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 zero-parameter read tool with an output schema and full annotation coverage, the description supplies everything an agent needs: what is returned, unit, freshness, source, and what it is not. Nothing material is missing.

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 input parameters, so there is nothing for the description to document; baseline 4 applies. The karat values (24K, 22K, 21K, 18K, 14K) hint at the shape of the response but are not an input concern.

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?

Names a specific resource (Dubai retail gold rates), unit (AED per gram by karat) and source, and explicitly disambiguates itself from spot bullion prices. An agent can tell exactly what data this returns without opening the schema.

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?

Usage is implied by the inherently single-purpose nature of the tool, and the closing line ('not spot bullion prices') gives one mild exclusion. However, it never states when to prefer this over adjacent financial data tools like cbuae_exchange_rates or currency_rates.

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