reddit_new

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

With no annotations provided, the description must carry the behavioral disclosure burden. It states the core behavior and the default limit, but does not disclose auth requirements, rate limits, error behavior, or how 'newest' is determined. This is adequate for a simple read-only fetch but lacks richer behavioral context.

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?

One lead sentence plus a compact argument list conveys everything needed with no wasted words. The core action is front-loaded, and parameter details are structured for quick parsing.

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 two-parameter fetch tool with an output schema, the description sufficiently covers the operation and both parameters. The main gap is sibling routing and when-to-use guidance, but that is more of a selection concern than a completeness gap for invoking 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?

Schema property descriptions are absent, so the description is the only semantic source for parameters. It adds the critical 'without r/' convention for subreddit and clarifies limit as 'Posts to fetch' with its default, giving the agent usable meaning beyond the raw schema.

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 opens with a specific verb-resource pair, 'Get newest posts from a subreddit,' and the qualifier 'newest' distinguishes it from sort-oriented siblings like reddit_hot, reddit_top, and reddit_rising. It doesn't explicitly name alternative tools, so it stops just short of full sibling differentiation, but the purpose is 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 is given about when to use this tool versus reddit_hot, reddit_top, reddit_rising, reddit_front, or reddit_post. The only implicit signal is the tool name and the word 'newest.' An agent is left to infer selection criteria from sibling names rather than from explicit instructions.

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