Test LINE Webhook Endpoint

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

Goes beyond annotations by detailing the LINE server's verification process (200, timeout, signature), error reasons (INVALID_REPLY, UNAUTHORIZED, etc.), and timeout of 10s. Annotations only indicate idempotency and non-destructiveness; the description adds rich behavioral context.

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 concise sentences plus a clear return structure line. All information is front-loaded and every sentence adds value. No redundant or vague phrasing.

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 2 parameters, no output schema, and good annotations, the description fully covers purpose, usage, behavior, parameters, and return values. The agent can select and invoke this tool correctly without additional context.

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 description explains the 'override_endpoint' parameter explicitly ('test a URL other than the configured one'). The 'oa' parameter is implied by context ('Ping the OA's webhook URL') but not defined in the description. Schema coverage is 50% due to the undocumented 'oa', so the description partially compensates.

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 pings the OA's webhook URL and reports HTTP status and latency, with specific checks by LINE. This verb+resource combo is distinct from all sibling tools, which focus on other LINE operations.

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?

Explicitly says 'Use this FIRST whenever a bot stops responding, before debugging anything else.' This provides clear when-to-use guidance and implies it's the initial diagnostic step. No alternative tool exists among siblings for this specific task.

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