create_merge_request_thread

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

The description only says 'create a new thread' and does not disclose any behavioral traits beyond that. The annotation 'openWorldHint' suggests additional behaviors, but the description fails to elaborate on side effects, permissions, or limitations. The schema provides some behavioral hints (e.g., line_code criticality) but the description carries the primary burden.

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, short sentence with no wasted words. It is concise and front-loaded, though it could benefit from additional context. The structure is clear despite being minimal.

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 complexity of the nested position parameter and the presence of several sibling tools for merge request discussions and notes, the description is too sparse. It does not explain what constitutes a 'thread' versus a 'note' or 'discussion note', nor does it clarify that position is optional but often required for diff comments. The detailed schema compensates somewhat, but the high-level context is missing.

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?

All parameters and their sub-properties are fully described in the input schema (100% coverage). The description adds no additional parameter information, so it meets the baseline but does not enhance understanding beyond the schema.

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 creates a new thread on a merge request, using a specific verb and resource. However, it does not distinguish between this tool and siblings like 'create_merge_request_discussion_note' or 'create_merge_request_note', which could lead to confusion about when to use each.

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 usage guidelines are provided. The description does not indicate when to use this tool versus alternatives, nor does it mention prerequisites or context for creating a thread. The schema contains detailed field instructions, but the description itself lacks guidance.

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