analyze_coverage

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

No annotations are provided, so the description must disclose behavioral traits. It only states what the tool does without indicating side effects, permissions, or output characteristics. It does not say whether it modifies state or what 'gaps' means in terms of 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, front-loaded sentence that efficiently conveys the tool's purpose. There is no unnecessary repetition, and it is easy to read. However, it could be expanded slightly to improve completeness without sacrificing brevity.

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?

Despite having an output schema and 4 parameters, the description is very brief. It does not explain what constitutes a 'gap', how coverage is measured, or the role of optional parameters like 'language' and 'source_code'. This under-specification leaves the agent unclear on how to invoke the tool effectively.

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, so parameters are documented in the schema. The description adds no additional semantics beyond the schema. Baseline score 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 clearly states the tool's purpose: analyzing test coverage and identifying gaps. The verb 'analyze' with the resource 'coverage' is specific. However, it does not explicitly distinguish itself from sibling tools like 'validate_test_contract' or 'build_traceability_matrix', which might also involve analysis.

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, prerequisites, or when alternatives are better suited. There is no mention of required input state or context. For a tool with multiple siblings, this omission reduces usability.

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