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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=false, so the safety profile is known. The description adds no behavior beyond that: nothing about duplicate-name handling, required permissions, side effects, or whether a project must be created before run_project or create_test. For a creation tool with no output schema, that is a meaningful gap.

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 front-loaded sentence with no filler; the verb and resource come first. Its brevity is efficient rather than padded, though it leaves little substance behind.

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 two-parameter creation tool with full schema coverage and annotations, the minimum an agent needs to invoke it is present. However, the agent still cannot tell what a project is required for downstream (run_project, create_test) or what happens on a name collision, which matters for a create operation.

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% and both parameters carry descriptions including the 80-character limit, so the description need not restate them. It adds no extra meaning, such as whether names must be unique or whether description is searchable, so baseline 3 applies.

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 states a specific verb and resource ("Create a project") that clearly separates it from delete_project, get_project, and update_project. It stops short of describing scope or prerequisites, but the core action is unambiguous.

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 clause "for example one per site or app" hints at a granularity convention but gives no when-to-use versus alternatives, no prerequisites (workspace? permissions?), and no exclusions. An agent learns a naming convention, not routing guidance.

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