sg_coe_prices

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

With no annotations, the description carries full responsibility. It discloses the tool returns bidding results and quota premiums by category, but does not mention any limitations, rate limits, or the behavior of the optional 'limit' parameter. This is adequate for a simple read operation but leaves some ambiguity.

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?

The description is extremely concise—two sentences with no fluff. It is front-loaded with the primary action ('Get COE...') and includes essential detail about the content (quota premiums by vehicle category) without unnecessary elaboration.

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?

Given the simplicity of the tool (one optional parameter, no output schema), the description provides a reasonable overview of what the tool returns. However, it omits any mention of the 'limit' parameter and does not fully specify the output structure beyond 'quota premiums by vehicle category'. Still, it is largely complete for the tool's apparent straightforward nature.

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 schema has one parameter ('limit') with a default of 10, but the description does not mention or explain it. Since schema description coverage is 0%, the description fails to add value beyond the parameter name itself. The purpose of 'limit' (e.g., maximum number of results) is not clarified.

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 states it retrieves COE bidding results and prices, specifying the output as quota premiums by vehicle category. This distinguishes it from sibling tools like sg_hdb_prices or sg_dataset_fetch which deal with different data types.

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 context implies this tool is for COE price queries, but there is no explicit guidance on when to use it versus alternatives. No exclusions or mention of related tools are provided, so usage is only implied by the tool name and description.

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