create_webhook_subscription

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 only states the action without disclosing side effects, idempotency, permissions required, or what happens upon successful registration. The mention of HTTPS is redundant with the URL parameter description. There is a lack of important behavioral context for a mutating operation.

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 sentence that is front-loaded with the core action and resource, contains no filler or redundancy, and is immediately understandable.

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 only two parameters, full schema coverage, and an output schema, the description is minimally acceptable. However, the lack of behavioral details (e.g., whether the URL is verified, if duplicates are allowed) leaves gaps that are not compensated by annotations, warranting a score below 4.

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%: both 'url' and 'category' already have descriptive text. The tool description adds no additional meaning beyond what the schema provides, so it meets the baseline with no extra value, but does not need to compensate for missing parameter info.

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 uses a specific verb 'Subscribe' and clearly states the resource ('OwnerRez events') and mechanism ('registering an HTTPS callback URL'). It distinguishes itself from sibling tools by focusing on creation rather than listing or deleting webhook subscriptions.

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 clear usage context: use this when you need to receive event notifications by registering a callback URL. It does not explicitly mention alternatives or exclusions, but the intent is clear enough for an agent to select this tool over list_webhook_subscriptions or delete_webhook_subscription.

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