generate_change_summary

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 behavior disclosure. It discloses that the result is a human-readable summary with categories, but it does not explicitly state whether the tool is read-only or whether there are side effects/prerequisites. For a compare-and-summarize tool this is adequate but not fully transparent.

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 one front-loaded sentence that states the operation, the inputs, and the output categories without waste. It is efficiently structured and easy to parse.

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?

With an output schema present, return values are presumably covered by the schema. The input roles are stated, but the lack of repo and ref format details combined with zero schema coverage leaves real ambiguity for an agent about which strings are valid.

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 0%, so the description is responsible for clarifying all three parameters. It clearly maps base_ref and head_ref to git refs, but it does not explain repo identifier formats, ref formats, branch/SHA/tag handling, or any constraints. The description adds partial meaning beyond the bare parameter names, but it is not sufficient.

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 identifies a clear verb and resource: it compares base and head git refs for a repository and produces a categorized summary. It is distinguishable from siblings like recent_commits or inspect_pr because it is about generating a diff-based summary, not about PRs, issues, or raw commit listings.

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 use case is clear: an agent should call this when it needs a categorized summary of changes between two refs. It does not explicitly name alternatives or exclusion cases, but the trigger condition is stated directly in the description.

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