Get Threads Carousel Items

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds a little context by clarifying that the result is a set of individual carousel items, but it does not describe pagination, response shape, or any other behavioral traits beyond what annotations already 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?

The description is appropriately short and front-loaded. The purpose statement is the first sentence, and the Args block provides the only necessary parameter clarification. There is no filler, redundant phrasing, or content that merely repeats the title or annotations.

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?

For a simple, read-only, idempotent tool with only two parameters and no output schema, the description is largely complete. The only minor gap is that it does not explicitly mention the response_format default behavior in the Args block, but the schema already documents that parameter and its enum options. Overall, the description gives enough context for an agent to call the tool correctly.

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 schema leaves media_id undocumented, but the description compensates by stating 'media_id (string): Carousel media ID.' The other parameter, response_format, is already fully documented in the schema with enum values and a default. Together, the description and schema give sufficient semantic coverage for all parameters despite the 50% schema description 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?

The description uses a specific verb and resource: 'Gets individual items in a Threads carousel post.' This clearly differentiates the tool from related siblings like threads_get_post or threads_get_replies by focusing on carousel children specifically. The title reinforces the same purpose without adding ambiguity.

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 implies when to use the tool: when an agent needs the individual media items inside a Threads carousel post. However, it does not explicitly state when not to use it or name alternative tools that might be better suited for related tasks such as fetching the carousel post itself or its replies.

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