discord_create_thread

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

With no annotations, the description must carry the behavioral burden. It only states the basic creation behavior. It omits side effects, permission requirements, return value, and constraints such as auto-archive behavior. Important attributes like effects on channel state are absent.

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 two sentences long with no filler. It is front-loaded with the core action. However, it could be slightly more structured (e.g., bullet points) but remains efficient.

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 6 parameters, no output schema, and no annotations, the description is incomplete. It does not cover parameter roles, return values, or error scenarios. For a creation tool with multiple configuration options, it provides insufficient information for correct invocation.

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 coverage is only 33%, and the description adds no parameter details beyond the existence of messageId. It fails to explain type, slowmodeSeconds, autoArchiveMinutes, name, or channelId semantics, leaving the agent to infer from the schema alone.

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 'Create a thread' with a clear verb and resource. It adds specificity by noting the two modes (via messageId or standalone), which helps distinguish basic usage. However, it does not explicitly differentiate from similar create tools like discord_create_forum_post, so it is not a perfect 5.

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 provides guidance on when to use messageId versus not ('Pass messageId to thread off a message, otherwise a standalone thread'), which is helpful. However, it offers no comparison with sibling tools like discord_create_forum_post or discord_edit_thread, and no when-not-to-use advice.

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