get_merge_request_comments_by_url

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

With no annotations provided, the description carries the full burden. It clearly conveys that this is a read-only fetch operation, but it does not disclose response shape, pagination, or access requirements. For a simple non-destructive tool, this is adequate but not rich.

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 clear sentence with no wasted words. The action and the key input requirement are both front-loaded, making it easy for an agent to parse quickly.

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 one-parameter tool with no output schema and no annotations, the definition is reasonably complete: an agent knows what to fetch and what input to provide. It could be improved by explicitly differentiating from get_merge_request_comments or describing the returned comment structure, but this is not essential for invocation.

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 schema already documents the single 'url' parameter with format and an example at 100% coverage. The description mainly reiterates 'using a full URL' and does not need to add much, so the baseline of 3 is appropriate.

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 (Fetch), the resource (merge request comments), and the input mode (full URL). It is clear enough to distinguish from get_merge_request_comments, though it does not explicitly name the sibling or explain the difference.

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 parameter description explicitly says 'Use this to fetch comments if you have the URL', giving a clear condition for when to use the tool. It does not explicitly state when not to use it or point to the ID-based alternative, but the URL-based trigger is clear.

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