Create Merge Request Thread

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

Annotations indicate this is a write operation (readOnlyHint=false) and not destructive. The description simply restates the creation action without adding behavioral details such as authentication requirements, rate limits, or what happens on conflict. It adds no value beyond the annotations.

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 very concise at one sentence with no wasted words. However, its brevity sacrifices necessary detail. It is well-structured for a single sentence but lacks the structure that a longer description could provide.

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 lack of an output schema, the description should explain what the tool returns or any side effects. It does not. Additionally, in the context of many sibling tools, the description fails to provide enough context for the agent to correctly select this tool over alternatives.

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 coverage is 0%, meaning no parameter descriptions exist in the schema. The description only hints that 'position' relates to diff positions, but does not explain the meaning or format of 'body', 'project_id', 'created_at', or 'merge_request_iid'. The agent lacks essential information to use the parameters correctly.

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 action ('create') and resource ('MR discussion thread'), and adds the key feature of supporting diff positions. However, it does not differentiate from closely related siblings like 'gitlab_create_merge_request_discussion_note' or 'gitlab_create_merge_request_note', which could cause confusion.

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 guidance is provided on when to use this tool versus alternatives. The agent is not told that this creates a top-level discussion thread, while other tools create notes or replies. There is no mention of prerequisites or when not to use it.

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