threads_get_post_details

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

With no annotations provided, the description carries the full burden. It discloses the return format ('JSON string') and lists the included fields ('text, timestamp, media type, permalink, and quote status'). This gives useful context about what to expect. It does not mention error cases or authentication, but for a simple fetch tool, this level of transparency is solid.

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 very concise, with a clear one-sentence purpose followed by Args and Returns sections. Every line provides useful information; no fluff or redundancy. It is well-structured and front-loaded.

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 tool's simplicity (one required parameter) and the presence of an output schema, the description is complete enough. It states the purpose, explains the argument, and summarizes the return content. There are no hidden complexities or missing critical context.

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%, but the description compensates with an explicit 'Args' section: 'post_id: The ID of the post to retrieve.' This adds meaning beyond the schema's bare title 'Post Id.' Although only one parameter exists, the description adequately explains its semantic role.

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 the tool's purpose: 'Fetch detailed information about a specific Threads post.' It uses a specific verb ('Fetch') and identifies the resource ('specific Threads post'), which distinguishes it from sibling tools like threads_get_posts (plural, listing) and threads_get_post_insights (analytics). The name also reinforces this.

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 usage: use this when you need details for a specific post identified by post_id. However, it does not explicitly mention alternatives or when not to use it, such as comparing against threads_get_posts for lists or threads_get_replies for comments. The guidance is present but not explicitly contrasted with siblings.

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