get_thread_replies

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

Annotations are absent, so the description carries the full behavioral burden. 'Fetch' indicates read-only and 'all' implies a collection, but the description does not disclose return shape, auth/permission requirements, pagination, ordering, or behavior when there are no replies. With no output schema, this gap matters.

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?

A single seven-word sentence that front-loads the action and content with no filler. It does not repeat schema field names or waste words.

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 low-complexity getter with two well-described parameters, the definition enables confident invocation. However, without an output schema or annotations, the agent is left to guess what the returned replies look like and whether 'all' may involve pagination, making the definition minimally complete but not richly contextual.

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 covers both parameters fully with descriptions ('Channel ID containing the thread' and 'Timestamp of the parent message'), so the baseline is 3. The description adds only the 'Slack thread' context and provides no additional value constraints or format details.

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 verb 'Fetch' plus the resource 'all replies in a Slack thread' is specific and unambiguous. It also stands apart from sibling tools like send_message and get_channel_info because it is the only one describing thread-reply retrieval.

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 implies the intended use case, retrieving all replies for a thread, but provides no explicit when-to-use guidance and names no alternatives. For a simple getter this is adequate, though there is no exclusion or alternative routing.

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