generate_nestjs_service

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does add some useful context ('transactions' describes generated behavior, 'Pro feature' signals an entitlement gate), but it fails to disclose that generation modifies the project, whether existing files are overwritten, or whether the api_key parameter is required to unlock the Pro 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 with no filler: verb first, then resource, then qualifiers. Every word earns its place, though it is slightly terse given the missing usage and behavioral context.

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?

There is no output schema and no annotations, so the description must compensate. It covers the tool's purpose but omits what files/output get produced, whether api_key is needed, and when to choose this over the NestJS sibling tools. The 100% parameter schema coverage partially compensates, but the overall agent decision context is 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?

Schema description coverage is 100%, so all three parameters (api_key, database, service_name) are already documented in the schema. The description adds marginal value by hinting that the repository pattern depends on the chosen database integration, but it does not elaborate on parameter usage beyond that. Baseline 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 a specific verb ('Generate') with a clear resource ('a NestJS service') and adds distinguishing qualifiers ('repository pattern and transactions'). This differentiates it from sibling tools like generate_nestjs_module and generate_nestjs_controller by naming the service layer specifically, though it never names a sibling explicitly.

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 such as generate_nestjs_module, generate_nestjs_controller, or other scaffold generators. It does not mention prerequisites, exclusions, or selection conditions; the 'Pro feature' note communicates entitlement, not usage context.

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