reddit_subreddit_comments

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

Annotations already indicate read-only and non-destructive. Description adds behavioral context: the feed nature, the `after` cursor for pagination, and the type of data returned. This goes beyond annotations by explaining the polling pattern and result composition.

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?

Three short, purposeful sentences. Front-loaded with the core action, then return fields, then usage example. No redundant info.

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?

No output schema, so the description compensates by listing return fields (body, author, score, etc.) and mentioning the after cursor. With 3 params and a simple read operation, this is solid, though it could mention any rate-limit or latency caveats for a 'stream'.

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 covers all parameters with detailed descriptions (100% coverage). The description adds an example value for `name` and links `after` to polling, but this is marginal beyond the schema. Baseline 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?

Clearly identifies the tool as streaming newest comments across a subreddit, explicitly distinguishing from a single post's thread. Provides specific verb ('Stream'), resource ('entire subreddit'), and return field overview. Distinguished from sibling reddit_post_comments via 'not one post's thread'.

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?

Gives clear usage context: polling to catch new comments in a community, and excludes the single-post-thread use case. However, it does not name an explicit alternative tool like reddit_post_comments, so it falls short of fully explicit 'use X instead' guidance.

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