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

Annotations already declare readOnlyHint=false and destructiveHint=false, so safety is covered. The description usefully adds that a sandbox is provisioned ('wake its sandbox'), implying latency and resource creation, but says nothing about required permissions, idempotency on duplicate names, or whether the sandbox is ready on return.

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 zero filler. It is appropriately sized for a simple create tool, though it could spend one more clause on the sandbox side effect without becoming verbose.

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?

No output schema exists, but the annotations plus the description cover the essentials for a create tool: what is created and that a sandbox is started. Missing only the return/preparation semantics and the optionality of the two parameters, which keeps it from a 5.

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 50% – only 'prompt' is documented in the schema ('Short description used for naming'), while 'name' has no description. The tool description adds no parameter information at all, notably omitting that both parameters are optional and how naming is derived from the prompt when name is absent.

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 and resource ('Create a new Mythex project') and adds a distinguishing side effect ('wake its sandbox') that separates it from list_projects, get_project, and update_project. It does not explicitly name a sibling, so it falls just short of full differentiation.

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?

Use is only implied by the verb 'create' – an agent can infer this is the starting point for a new project. No when-not guidance, no prerequisites, and no pointer to alternatives (e.g. import_project for existing code) is offered.

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