Register Retrograde-Start Webhook

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

Annotations indicate readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=true. The description states 'Fires when…' but does not disclose additional behavioral traits like persistence, idempotency, rate limits, or authentication requirements beyond what annotations already provide.

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 brief and front-loaded with the trigger condition. The group label and example are useful and concise, though the group label consumes space without adding functional detail.

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 simple input (one required parameter) and no output schema, the description covers the basic trigger condition. However, it omits details about registration persistence, success/error responses, or limits, which could be helpful for an agent.

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?

With 0% schema description coverage, the description must compensate, but it only provides an example request body. It does not explain the purpose of the 'url' parameter beyond showing a URI format, leaving the agent to infer that it's the webhook endpoint.

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 that the tool fires when any planet from Mercury to Pluto stations retrograde, and the title indicates it registers a retrograde-start webhook. This distinguishes it from siblings like webhooks_retrograde_end.

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 includes a '[Group: Webhooks]' label which groups it with other webhook tools, but does not explicitly state when to use this one over alternatives. It specifies the trigger condition but lacks guidance on when not to use it.

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