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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds only the ID-provenance dependency and does not disclose return format, rate limits, or data freshness, so it adds moderate but not rich behavioral value.

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, front-loaded with the core purpose and followed by the essential ID-sourcing hint. Every sentence earns its place with no redundancy.

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 single-parameter detail lookup with rich annotations and full schema coverage, the description is sufficient to invoke correctly. It could say a bit more about the returned detail contents, but the low complexity means little is genuinely 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?

Schema description coverage is 100%, so baseline is 3, but the description adds meaningful provenance: it tells the agent the station_id should come from nrel_alt_fuel_stations results, which the schema alone does not convey. That is genuine value beyond the parameter definition.

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+resource+scope: 'Detailed info for a single alternative fuel station by station ID.' It is clearly differentiable from the sibling nrel_alt_fuel_stations (search) tool, so an agent can pick between detail-lookup and search without opening schemas.

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, 'Get the ID from nrel_alt_fuel_stations results,' establishes the workflow precondition and points to the alternative sibling, giving clear context for when this tool applies. It stops short of explicitly stating when NOT to use it, but the routing intent is unambiguous.

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