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

Discloses auth requirement for my_posts and public access for others, but lacks details on rate limits, error handling, or pagination behavior. With no annotations, more depth would be beneficial.

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?

Two efficient sentences with no redundancy. Purpose is front-loaded, then conditions added. Every word earns its place.

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?

Covers main functional aspects (modes, access) and maps parameters to real-world meaning. Lacks description of return format but acceptable given no output schema and self-explanatory parameters.

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?

Adds meaning beyond schema: explains action values (hot=trending, new=latest, my_posts=own), clarifies api_key needed for my_posts only. Schema already covers all parameters, so description provides useful context.

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?

Description clearly states verb 'browse', resource 'community posts', and distinguishes three actions (hot, new, my_posts) with access conditions, effectively differentiating from sibling tools.

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?

Implies usage context (public vs API key required) but does not explicitly compare to alternatives like browse_submolts or search. No when-not-to-use guidance.

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