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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=true, so the write/open-world nature is covered. The description adds the field vocabulary of a webhook but does not disclose auth requirements, side effects, or whether creation triggers delivery attempts beyond what the annotations imply.

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?

Two sentences, no filler, with the core action front-loaded and the field list kept to a compact inline enumeration. Every clause carries 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?

An output schema exists, so return values need not be described, and annotations cover the safety profile. The gap is that an agent is not told which fields are required to create a valid webhook, given the open-ended input object, leaving a meaningful operational unknown.

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?

The declared schema is an opaque object (additionalProperties: {}, only 'Webhook fields'), so the description's enumeration of name, url, itemtype, event, is_active, payload, http_method, use_cra_challenge is the only real field documentation, with useful examples for itemtype and event. However it is framed as 'common fields' with no required/optional distinction or formats, so it compensates only partially. Baseline 3 given the nominal 100% coverage.

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?

States a specific verb (create) and resource (webhook), which cleanly separates it from siblings like glpi_update_webhook, glpi_get_webhook, and glpi_set_webhook_active. It does not explicitly name those siblings, but the name+title make the purpose 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?

No guidance on when to use this tool versus alternatives, no mention of prerequisites, permissions, or when not to create a webhook. It simply restates the action, leaving all routing decisions to inference.

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