simulate_github_event

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

With no annotations, the description carries the full burden. It discloses meaningful behavior: the event is signed with X-Hub-Signature-256, and the 'app' parameter overrides set_app for this call. However, it does not explain side effects (e.g., whether a delivery record is created), what happens if no app is set, or whether a registered webhook is required.

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 two sentences long with no wasted words. The first sentence states the core action and target, and the second clarifies a critical parameter override behavior. Information is front-loaded and directly useful.

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 tool with 3 optional parameters and no output schema or annotations, the description is partially sufficient but leaves gaps: full event type enumeration, payload semantics, behavior when app is not provided, and expected return/result. It provides enough to attempt a call but not enough to anticipate all outcomes.

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 0%, so the description must compensate. It explains the 'app' parameter and lists example event types, but the 'payload' parameter receives no explanation. The event_type values are only partially enumerated ('push, issues, pull_request'), leaving ambiguity about the full allowed set.

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 the action ('Fire a GitHub webhook event'), the specific event types supported ('push, issues, pull_request'), and the target resource ('the app's registered GitHub webhook'). This distinguishes it from sibling simulation tools like simulate_stripe_event or simulate_facebook_event by explicitly naming GitHub.

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 implies its use case through the GitHub-specific wording, but it does not explicitly state when to choose this tool over alternatives like trigger_webhook or simulate_delivery_webhook. It gives no exclusions or direct routing guidance, so usage context must be inferred from the tool name and sibling set.

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