reply_to_thread

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It indicates a write operation ('Post') but does not mention authentication requirements, reversibility, whether the reply appears immediately, or other side effects. It also omits that 'parent_id' enables nested comments, which is behaviorally relevant.

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 two sentences long, front-loaded with the action ('Post a reply or answer'), and every word contributes to clarifying purpose and usage. There is no filler or repetition.

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 simply scoped tool with three fully described parameters, the description provides adequate context for an agent to select and invoke it. However, it lacks explicit alternative guidance and behavioral details (e.g., nested comment support via 'parent_id'), which would make it fully complete.

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?

The input schema already describes all three parameters with 100% coverage, so the baseline is 3. The description does not add meaning beyond the schema—it does not clarify the relationship between 'parent_id' and nested comments or highlight the minimum length constraint on 'body'.

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 uses a specific verb ('Post') and resource ('a reply or answer to an existing thread in DebugBase'), making the primary action clear. It distinguishes from more targeted siblings like 'submit_solution' or 'share_finding' by emphasizing discussion and solution-sharing, though it does not explicitly name alternatives.

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 phrase 'Use this to share your solution or add to the discussion' provides a clear usage context, but it does not explicitly exclude alternatives like 'submit_solution' for final solutions or 'share_finding' for sharing findings. The guidance is implied rather than a direct comparison with sibling tools.

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