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

Annotations already declare readOnlyHint, idempotentHint, closed-world and non-destructive, so the safety profile is fully covered. The description adds value beyond that by disclosing the content scope: rules, parts/boards with pin data, and a complete worked example. It says nothing about output size or format, which is the only remaining gap for a large reference document.

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 sentence, front-loaded with what the document contains, with the actionable instruction ("Read this first") placed last as a call to action. The parenthetical enumerating the project elements is dense but each item earns its place.

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 no-parameter, no-output-schema reference tool, the description tells the agent what it will get and that a full example is included, which is enough to decide to call it. Only the size/shape of the returned document is unstated.

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 takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. No parameter-level claims are made or needed.

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 the concrete deliverable — the rules for writing a Mokxi project (board, parts, wires as "partId.pin" pairs, code), the common parts/boards with their pins, and a complete example. That is specific enough to distinguish it from get_part (single part lookup) and get_example, and it is clearly a reference/documentation tool rather than an action. It stops short of a clean verb+resource statement, which keeps it off a 5.

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?

"Read this first" is explicit ordering guidance and effectively routes the agent here before create_project or validate_project. It gives clear context for use but states no exclusions (e.g., when get_part or get_example is the better destination for a narrower question).

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