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

No annotations are provided, so the description carries the full burden of disclosing behavioral traits. It only states what the tool produces and does not mention any side effects, limitations, or expectations about input size or return format. It does not contradict annotations (none exist), but it adds minimal behavioral context.

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 that front-loads the main action and resource. Every word earns its place; there is no fluff or redundancy.

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?

The tool has no output schema and no annotations, so the description should compensate by explaining what the structured breakdown looks like or how the summary is returned. It does not. The description is too minimal to give an agent a complete picture of what the tool will return or how it handles edge cases.

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 provides 100% coverage for the single parameter ("Array of commit messages to summarize"). The description doesn't add additional parameter semantics, but the schema is already clear. With high schema coverage, a 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 uses a specific verb ("Produce") and names the resource ("a set of commits"), and it clarifies the two outputs (natural-language summary and structured breakdown). It is distinct from sibling tools like detect_breaking_changes or generate_changelog, though it could be more explicit about exactly how it differs from format_release_notes.

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 sibling tools. It does not mention alternatives or exclusion criteria. The agent is left without context about whether to choose summarize_commits over generate_changelog or generate_pr_description.

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