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

Annotations already declare readOnlyHint, idempotent and non-destructive, and the description reinforces them with real substance: nothing is persisted, no account is required, and the link itself carries the entire project. It further discloses the failure mode (refusal with errors when validation fails) and the obligation to return the link verbatim, none of which appears in the annotations or schema.

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 two core claims lead: what the link is and that nothing is stored. Every sentence carries information, including the refusal condition and the hand-off instruction. It is slightly longer than needed and the colon-led enumeration makes the opening sentence read a bit loosely.

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 single-object-parameter tool with no output schema, the description conveys the essential return value (a self-contained link) and the failure behavior. It stops short of stating the exact response shape, but the practical outcome for the agent is unambiguous.

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 the nested project object is thoroughly documented, including format, board, parts, wires and code. The description's phrase 'the board, its code, and the parts and wires when there are any' only loosely restates those fields and notes that parts/wires are optional. Baseline 3 applies since the schema does the heavy lifting.

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 concrete action and output: it makes a link that opens the project in the Mokxi editor and runs the board, code, parts and wires. It also corrects a likely misreading of the name 'create_project' by clarifying that nothing is stored. It does not, however, distinguish itself from the sibling create_code_link, whose name suggests an overlapping purpose.

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?

It gives a clear conditional: the call is refused with errors while validate_project finds problems, which effectively tells the agent to validate first. It also gives a downstream instruction to hand the link to the person unchanged. What is missing is any explicit statement of when to prefer create_code_link or another sibling instead.

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