get_merge_request_diffs

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

With no annotations, the description carries the full burden of behavioral disclosure. 'Get' clearly implies a read-only operation, and the note about required identifiers adds some context, but the description does not disclose output format, pagination, or how excluded_file_patterns affects results.

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 concise sentence with no filler. However, the parenthetical constraint is not perfectly aligned with the actual schema parameter names, which slightly reduces the structural quality.

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 five parameters, no output schema, and no annotations, the description should do more to ensure correct invocation. It attempts to convey a required-identifier constraint that the schema leaves implicit, but the naming mismatch undermines that guidance, and no alternative tools or return behavior are mentioned.

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 100%, so the baseline would be 3, but the description introduces parameter names ('mergeRequestIid', 'branchName') that do not exist in the schema; the actual properties are 'merge_request_iid' and 'source_branch'. This mismatch is misleading and could cause an agent to construct an invalid invocation.

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 and resource: get the changes/diffs of a merge request. However, it does not differentiate this tool from siblings like list_merge_request_diffs or get_branch_diffs, and the parameter names used in the description do not match the schema exactly.

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 a clear invocation constraint: either mergeRequestIid or branchName must be provided. It does not, however, explain when to prefer this tool over alternatives such as get_branch_diffs or list_merge_request_diffs, leaving the usage context only implied.

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