Update Jest Configuration

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

No annotations exist, so the description carries the burden. It mentions 'merging new settings' but does not elaborate on merge semantics (e.g., shallow vs deep, error handling, persistence). Basic transparency is provided but lacks detail.

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?

Two sentences concisely convey the purpose and typical use cases without extraneous information. The key point is front-loaded.

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?

No output schema is provided, but the description adequately covers the input and operation. However, it could mention return value or side effects (e.g., if validation occurs). Overall sufficient for a straightforward update tool.

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 coverage is 100% with descriptions for both parameters. The description adds context by explaining the merge behavior, which goes beyond the schema's 'merge with existing config' note. This helps the agent understand the update mechanism.

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 action: update Jest configuration in a workspace via merging. It distinguishes from sibling tools like 'add-test-file' or 'run-test', which focus on other test-related operations.

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 usage guidance by listing example adjustments (coverage thresholds, test patterns). However, it does not specify when not to use this tool or mention alternatives, though sibling tools imply distinct purposes.

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