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

Annotations already declare this is a non-destructive, non-idempotent, closed-world write. The description goes beyond them by disclosing the created sub-resources (development, preview, production environments) and the ownership side effect, plus the token scope needed. It does not say what the response contains or how slug collisions are handled.

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?

A single compact sentence-cluster with zero filler: the creation scope, the derived environments, the ownership effect, and the auth requirement, front-loaded with the action. Nothing is redundant.

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 three-parameter creation tool with no output schema, the description covers side effects and auth but omits response shape, slug-collision/error behavior, and the meaning of the name and description parameters. Adequate but with visible gaps an agent would want filled.

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 only 33%: only slug has a schema description. The description mentions no parameter at all, leaving name (required, 1-80 chars) and description (max 500) undifferentiated and unmotivated. It does not compensate for the coverage gap.

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?

States a specific verb+resource ("Create a project") and adds the side effect that three environments are provisioned and the caller becomes owner. It does not explicitly distinguish itself from siblings like create_environment or update_project, though the verb+resource pairing is clear enough to separate it.

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 through the permission prerequisite ("Requires projects:write on a token that reaches all projects"), which effectively states a precondition for calling. It gives no explicit when-not guidance or named alternative such as update_project for existing projects.

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