execute_webhook

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states the action (sending a message) without any information about side effects, authentication requirements, rate limits, idempotency, or error conditions. As a mutation tool, this is a significant gap with essentially no behavioral transparency.

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 a single concise sentence, efficiently front-loaded with the core action. It contains no redundant fluff, but it is slightly under-specified for a mutation tool, earning a 4 rather than 5.

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?

With no annotations and no output schema, the description is the primary source of context. It lacks information about return values, error behavior, effect on the Discord channel, or how the webhook ID/token are used. For a 3-parameter mutation tool, this is significantly incomplete, making it difficult for an agent to anticipate the outcome.

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 100%, with all three parameters (content, webhookId, webhookToken) having descriptions. The description itself adds no parameter-level semantics beyond the action, but the schema is sufficient for understanding parameters. Baseline for high coverage is 3.

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 'Discord Webhookを実行してメッセージを送信します' (Execute Discord webhook and send a message), using a specific verb (execute) and resource (webhook) with a direct action. This distinguishes it from sibling tools like get_webhook, create_webhook, and delete_webhook, as well as from generic send_message. The purpose is unambiguous.

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. It does not mention that this is for webhook-based messaging as opposed to regular send_message, nor does it provide any exclusions or prerequisites such as needing a valid webhook ID and token.

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