get_reply_thread

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

No annotations are provided, so the description must cover behavioral traits. It discloses that it returns post numbers in server-reported order and performs a 'rerere traversal' (likely recursive). However, it does not mention potential errors, authentication needs, or side effects, leaving gaps.

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 front-loaded with a concise one-line summary followed by a clear explanation. The use of bullet points for parameters and return values improves readability, though the term 'rerere traversal' could be simplified.

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?

The description adequately covers inputs and outputs, but lacks usage guidelines and context for when to invoke this tool. Given the presence of an output schema, return value explanation is sufficient, but missing error handling or prerequisite info limits completeness.

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?

Although the input schema has 0% description coverage, the description compensates by providing clear parameter definitions for 'chat_id' and 'post_no' in a docstring format, adding meaning beyond the schema's basic type information.

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 clearly states the tool fetches the full reply thread rooted at a post, using server-side traversal. It distinguishes itself from sibling tool 'get_replies_to_post' by specifying it returns every transitively-reachable reply, indicating a recursive retrieval vs. direct replies.

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 description provides no contextual guidance on when to use this tool versus alternatives like 'build_conversation_thread' or 'get_replies_to_post'. It lacks any explicit conditions, prerequisites, or usage scenarios.

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