git_git_diff

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

With no annotations, the description carries the full burden for behavioral disclosure. It only states the basic operation, failing to mention that the tool is a read-only operation, how the staged parameter affects output, or whether changes are unstaged or staged. No safety or side-effect information is provided.

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, which is concise but lacks structure. It front-loads the purpose but omits parameter details or usage context. While not verbose, it could be more informative without sacrificing brevity.

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 git diff (see siblings like git_git_log, diff_diff_text), the description is incomplete. It does not describe the effect of the staged flag, the meaning of path, or the output format despite an output schema being present. Agents lack critical usage details.

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 has 3 parameters with 0% description coverage, and the description does not explain any parameter (staged, path, repo_dir). Agents cannot infer the meaning or defaults from the text, making correct invocation difficult.

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's action ('Show changes') and scope ('working tree or staging area'), using a specific verb and resource. It effectively distinguishes itself from sibling git tools like git_git_status (which shows state) and git_git_log (which shows history).

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 no guidance on when to use this tool versus alternatives (e.g., git_git_status or diff_diff_text), nor does it mention prerequisites or exclusions. The agent is left without context for tool selection.

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