why_is_this_weird

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

The description indicates the tool uses git history to answer questions, but with no annotations, it does not disclose whether the tool modifies data, requires special permissions, or the exact nature of its operations. It is adequate but lacks full transparency.

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 concise, consisting of two sentences and an example. It is front-loaded with the primary purpose and efficiently conveys value without unnecessary words.

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 no output schema and a moderate number of parameters, the description explains the tool's behavior well, including an example output. However, it does not address edge cases like files with no history or error conditions, leaving some gaps.

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 100% description coverage for both parameters, so the schema itself provides parameter meaning. The description adds context about the analysis type (git history, complexity) but does not extend parameter semantics significantly beyond the schema.

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 purpose: 'Explain why a specific file is the way it is, based on git history.' It provides a concrete example question and answer, distinguishing it from sibling tools like get_history or analyze_repo.

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 implies usage for understanding file complexity via git history, but it does not explicitly state when to use this tool versus alternatives (e.g., get_history for raw history), nor does it provide any 'when not to use' guidance.

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