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

Annotations already declare this is a non-read-only, non-destructive, non-idempotent creation, so the safety profile is covered. The description adds real context beyond them: the project starts with empty lists, ownership is either personal or visible to an entire team, and other tools subsequently treat it as the project. It does not disclose collision behavior or what is returned, but that is a modest gap given the annotations in place.

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 purpose is front-loaded and the text is short with no filler, which is good. But the third sentence ("It is your own, or with team that team's, for everyone in it") is garbled to the point of requiring re-parsing, and "The other tools then take it as project" is ambiguous about whether context switches automatically.

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 essentials are present: what is created, ownership scope, and downstream effect on other tools. It leaves unclear what the call returns, how name collisions are handled, and whether creating a project makes it the active context, which matters given there is no output schema to fall back on.

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 are documented with examples in the schema, so the baseline is 3. The description reinforces the naming convention ("Name it after that work") and the personal-vs-team ownership choice, but adds no format, length, or validation detail beyond what the schema already supplies.

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 and resource ("Start a new project") and adds meaningful scope detail: it is created with empty lists and is intended for work belonging to no existing project. It does not contrast itself with the `projects` or `list` siblings, so an agent must infer the boundary, and the phrasing "It is your own, or with team that team's" is grammatically mangled enough to slow comprehension.

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?

"for work that belongs to none of your projects yet, such as a new repo" gives a genuine when-to-create condition, and the team sentence implies the personal-vs-team choice. However, no alternative tool is named and no exclusion is stated (e.g., what to do when the work does belong to an existing project), so the routing guidance is implied rather than explicit.

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