get_line_status

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

No annotations are provided, so the description carries the full burden. It does not disclose any behavioral traits such as authentication, rate limits, or what specific status information is returned (e.g., disruptions only). The output schema exists but its content is not described.

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 very short and front-loaded with the main purpose. However, it includes an 'Args:' section that largely duplicates the schema, wasting a line. It could be more concise by omitting that section.

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 tool has only 1 parameter and an output schema exists, the description is minimally adequate. It does not explain the return value format or scope of 'status', but the output schema may compensate. For a simple tool, this is moderately complete.

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 coverage is 0%, but the description adds value by providing concrete examples of valid line IDs ('central', 'northern', 'piccadilly'), clarifying the parameter beyond the schema's type-only definition. This helps the agent understand expected input format.

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 'Get status for a specific London Underground line' with explicit verb and resource. It uses specific terminology (London Underground line) and provides example line IDs, effectively distinguishing it from siblings like get_road_status and get_tube_status.

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 description provides no guidance on when to use this tool versus alternatives, such as get_tube_status, or when not to use it. No contextual usage hints are given.

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