generate_pr_diff

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal a key side effect: the tool creates a diff file and returns its path. However, it is vague about what 'validated' means and does not explain if any resources are modified or side effects occur beyond file creation. It adds some transparency but leaves room for interpretation.

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, tight sentence of 18 words. It fronts the main verb 'Generate', includes all essential elements (action, object, input, output), and wastes no words. It is a model of concise writing.

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 tool with one parameter and no output schema, the description covers the basic action and return value. However, it does not clarify how this tool fits into the broader workflow with siblings like 'read_pr_diff' and 'save_pr_review', nor does it mention failure behaviors or the nature of the output path. It is adequate but not comprehensive for an agent to invoke it with full confidence in all scenarios.

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 describes the 'commitHash' parameter with a regex pattern and length limits, but the description adds the semantic that it should be a valid Git commit hash. This is useful but minimal, especially since schema coverage is 0% and the parameter name already hints at its content. The description does not elaborate on format or edge cases, so it only partially compensates for the lack of schema documentation.

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 ('Generate a PR review diff'), the input ('for a validated Git commit hash'), and the output ('return the resulting diff file path'). It is specific enough to understand the tool's purpose, though it does not explicitly differentiate from the sibling 'read_pr_diff' or mention alternatives, missing the top score.

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 gives no guidance on when to use this tool versus the siblings (e.g., 'use this to create a diff before reading it'). There is no indication of prerequisites beyond the hash being 'validated', and no mention of alternatives or conditions. The usage context must be inferred entirely from the name and description.

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