get_coin_cart

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

With no annotations, the description carries the full behavioral burden. It conveys useful domain context (the cart charges an electronic wallet and replaces coins) and the read-only nature is implied by 'Get ... schedule', but it does not state return behavior, freshness, or any operational constraints.

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 short sentences with the core purpose front-loaded. The second sentence leans promotional ('you no long have to keep coins', containing a typo) but still adds a small amount of domain framing at negligible cost.

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?

An output schema exists, so the description is not obligated to explain return values, and with zero parameters the input side is trivially complete. For a simple read-only lookup tool the description is adequate, with only the missing usage framing as a real 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 takes zero parameters, which is the baseline-4 case. Schema coverage is 100% for the (empty) parameter set, so there is nothing further the description needs to disclose about 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?

States a specific verb and resource (get coin collection cart schedule) scoped to Hong Kong, which is clearer than most siblings that are pure stat retrievals. It does not explicitly differentiate itself from any sibling, but none of the listed siblings covers coin carts, so confusion risk is low.

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?

There is no guidance on when to use this tool versus alternatives, no prerequisites, and no conditions or exclusions. The second sentence describes what the cart does rather than when an agent should call the tool, so usage must be inferred entirely from the name and description.

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