Reddit Subreddits

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

The description lacks behavioral details beyond the basic function. No annotations are provided, and the description does not disclose whether it is a read-only operation, what the response contains, or any potential side effects. The minimal information only implies a search behavior.

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 a single sentence with no extraneous text. It is concise and front-loaded, but it may be too terse for a tool that has sibling tools without differentiation.

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 lack of output schema and annotations, the description should explain what 'subreddit candidates' means (e.g., returns subreddit names, counts, descriptions). It also does not clarify how this tool differs from similar sibling tools like 'reddit_search', leaving the agent underinformed.

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?

Both parameters (query and limit) are described in the input schema with 100% coverage. The description adds no additional meaning (e.g., format, constraints) beyond what the schema already provides, so baseline score of 3 is appropriate.

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 'Find subreddit candidates for a topic' clearly states the action (find) and resource (subreddit candidates), but the term 'candidates' is somewhat vague and doesn't explicitly differentiate from sibling tools like 'reddit_search' or 'reddit_resolve_subreddits'.

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 on when to use this tool versus alternatives (e.g., reddit_search, reddit_resolve_subreddits). There is no mention of prerequisites, exclusions, or context for optimal use.

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