proto_generate_services

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

With no annotations, the description carries the full burden of disclosing side effects and prerequisites, but it only says 'Generate'. It does not clarify whether files are written, whether existing files get overwritten, what input is required, or how the api_key is used. Minimal behavioral visibility.

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 single sentence is free of filler and easy to parse, but it is under-specified rather than efficiently complete. A tool description this short omits required behavioral and parameter context, making it more an example of terse under-specification than appropriately sized.

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?

For a tool with no annotations, no output schema, and two parameters (one undocumented), this description is inadequate. It provides no sense of inputs, outputs, side effects, or when to prefer it over sibling generators. An agent would be calling the tool without essential context.

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?

Directory is documented in the schema as 'Project directory', but the description adds no parameter-level detail. The api_key parameter is entirely undocumented in both the schema and description, so the agent has no idea why it is needed or how it affects generation. With schema description coverage at 50%, the description should compensate but does not.

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 names a specific verb ('Generate') and a concrete resource ('gRPC service definitions'), so an agent can identify this as a generation tool for gRPC services. It does not, however, differentiate itself from sibling tools like proto_generate_schema or proto_generate_client, which creates some ambiguity about the exact scope of 'service definitions'.

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?

No guidance is given on when to use this tool versus alternatives such as proto_generate_schema or proto_generate_client. It simply states what it does, forcing the agent to infer usage from the name. Given the large sibling set of proto_* generators, explicit routing conditions would be valuable.

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