get_commit_coverage_totals

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

With no annotations, the description carries the full burden of behavioral disclosure. It states the tool 'returns' data, which indicates a read-only operation, but it does not mention error handling, authentication requirements, or what happens if the commit is not found. This is minimal but sufficient for a simple read operation.

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, clear sentence that directly conveys the tool's purpose. It is concise and front-loaded, with no wasted words or redundant information.

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 parameters, no output schema, and no annotations, so the description must stand alone. It explains what is returned (coverage totals and breakdown by file) but does not clarify how the commit is identified or what the response structure looks like. This leaves the tool's usage context incomplete.

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 is empty, so the baseline is 4. However, the description references 'a given commit' without providing any parameter or context for how the commit is specified. This introduces ambiguity and suggests a parameter that does not exist, which detracts from the value of the description.

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 function: returning Codecov coverage totals for a commit, broken down by file. The verb 'returns' and the specific resource 'coverage totals' make the purpose unambiguous. It is distinct from potential siblings by focusing on commit-level coverage totals.

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 use cases for retrieving commit coverage totals but provides no explicit guidance on when to use this tool versus alternatives. Since no sibling tools are listed, the lack of exclusion or alternative references is not critical, but the description could be clearer about the intended context (e.g., for a specific commit in a CI pipeline).

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