Create Discord webhook

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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description's one added fact, that the target channel must be text-capable, is genuinely useful context the annotations don't carry. However it says nothing about the non-idempotent consequence (repeated calls create duplicate webhooks) or the meaning of the 'confirm' flag, which is exactly the kind of behavioral detail a mutation tool should disclose.

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?

A single front-loaded sentence with no filler, and the channel-type constraint is stated up front. It is efficient, though the brevity reflects under-specification as much as discipline.

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 needn't be described, but for a write tool with five parameters, 0% schema coverage, and a non-idempotent mutation, the description is far too thin. An agent cannot infer when to set 'confirm', what 'avatar' accepts, or why 'reason' exists without guessing.

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% and the description explains none of the five parameters. Critical ones are opaque: 'avatar' (maxLength 10000000 suggests base64 image data), 'reason' (audit-log justification), and 'confirm' (apparently a confirmation safety gate) are all undocumented in both schema and description. The description only implicitly touches channelId via 'text-capable guild channel'.

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 states a specific verb and resource ('Create a webhook') plus a scope constraint ('in a text-capable guild channel'), which cleanly separates it from the sibling read/delete operations (discord_list_webhooks, discord_delete_webhook). It doesn't need to name a near-identical alternative because none exists in the sibling list.

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?

It gives no when-to-use guidance, no prerequisites (e.g. needing Manage Webhooks permission), and no exclusions or alternative paths. The only usable cue is the 'text-capable channel' restriction, which is a constraint rather than usage guidance.

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