create_webhook

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

The description notes that 'Not idempotent — calling twice may create duplicates,' which adds value beyond the annotations (idempotentHint false). However, it does not disclose other behavioral traits like required permissions, rate limits, or side effects beyond duplication. Annotations already indicate readOnlyHint false and destructiveHint false, so the description partially fills the gap.

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 somewhat repetitive, repeating 'Create a webhook' twice and including redundant phrases like 'Creates a new record.' The initial line with the label is useful but could be integrated more cleanly. It could be shortened to one or two sentences without losing information.

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 100% schema coverage and annotations, the description covers basic intent and non-idempotence. However, it does not mention the expected return value or that the created webhook object is returned. For a create tool, this is a minor gap. It is minimally complete but could provide more context about the response.

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%, with each property documented thoroughly. The description adds no additional meaning beyond what the schema already provides (e.g., required fields, validation rules). Baseline 3 is appropriate.

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 'Create a webhook' and includes a label 'WRITE · creates data · Webhooks · POST /webhooks', making the verb and resource explicit. It distinguishes from sibling tools like get_webhook, delete_webhook, and update_webhook, but does not differentiate from other create_* tools, which is acceptable given the distinct resource.

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?

There is no guidance on when to use this tool versus alternatives, such as when to create a webhook versus update or delete. No exclusions or prerequisites are mentioned, leaving the agent without context for appropriate invocation.

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