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

No annotations are provided, so the description alone must convey behavior. It correctly states the tool reports configuration and returns specific information, implying a read-only operation with no side effects. This is adequate for a simple retrieval tool, though a note about being non-destructive would improve 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 extremely concise (two sentences, 13 words) with no filler. Every word adds value: the action, the resource, and the output. The front-loaded structure allows quick comprehension.

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 tool's simplicity (1 optional parameter, no output schema, no nested objects), the description covers the core purpose and return structure. However, it could be slightly more complete by mentioning error conditions or the absence of side effects.

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 (the parameter 'workingDirectory' is described as 'Git repo path. Default current directory.'). The tool description adds no additional semantic value beyond what the schema provides, so a 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 uses the specific verb 'Report' and identifies the exact resource: 'current git credential helper configuration'. It also mentions the return values ('helper name and scope'), making the purpose clear and unambiguous. Among sibling tools like set_vault or reset_login, this tool's reading role is immediately understood.

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 implicitly indicates the tool is for checking the current configuration but provides no explicit guidance on when to use it versus alternatives (e.g., set_vault to modify, test_login to verify credentials). No when-not-to-use or prerequisites are mentioned.

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