create_venv

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, but it only states the action without explaining side effects, error conditions (e.g., if the path already exists), permissions, or dependencies (e.g., Python installation). This falls short of what an agent needs to predict the tool's 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, focused sentence with no filler or redundant phrases. It is appropriately sized for the simplicity of the tool and front-loads the core action.

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?

The tool is simple with one optional parameter and an output schema, but the description lacks key contextual details such as behavior when the path already exists or whether a specific Python version is used. While the output schema covers return values, the description is still thin on preconditions and edge cases, making it adequate but not complete.

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 tool description adds no information about the 'path' parameter beyond what the input schema already provides. Since the schema description covers the parameter fully (100% coverage), the baseline score of 3 is appropriate—the schema does the heavy lifting, and no additional meaning is required from the description.

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 ('Create') and the resource ('a new Python virtual environment'). It is specific and immediately distinguishes itself from sibling tools like activate_venv and deactivate_venv by focusing on the creation step.

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 implies usage by its clear purpose, but there is no explicit guidance on when to use this tool versus alternatives, nor any mention of prerequisites or follow-up steps (e.g., activating the venv after creation). The usage context is implicitly obvious from the tool name but not articulated.

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