Code MCP Server

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 behavioral disclosure. It mentions 'detailed analysis' but doesn't explain what that entails—such as whether it returns diff statistics, file changes, or commit metadata, or if it has side effects like modifying the repository. For a comparison tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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, efficient sentence that gets straight to the point without unnecessary words. It's front-loaded with the core action ('compare two commits') and adds a qualifier ('with detailed analysis'). However, it could be more structured by separating purpose from behavioral details.

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 comparing commits (which can involve diff outputs, statistics, or metadata), the lack of annotations and output schema means the description is incomplete. It doesn't clarify the return format, error conditions, or how 'detailed analysis' manifests, leaving the agent to guess. For a tool with 5 parameters and no structured output information, this is inadequate.

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 description coverage is 100%, so the schema already documents all five parameters thoroughly. The description adds no additional meaning beyond the schema, such as explaining how 'filePattern' interacts with the comparison or what 'detailed analysis' includes. With high schema coverage, the baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract.

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: comparing two commits with detailed analysis. It specifies the verb 'compare' and the resource 'commits', making it distinct from sibling tools like 'compare_files' or 'git_diff' which focus on different comparison targets. However, it doesn't explicitly differentiate from 'enhanced_git_diff' or 'get_diff_stats', which might offer similar functionality.

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. It doesn't mention when to choose 'compare_commits' over 'compare_files', 'git_diff', 'enhanced_git_diff', or 'get_diff_stats', nor does it specify prerequisites or appropriate contexts. The agent must infer usage from the tool name alone.

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