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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the closing 'Read-only' adds nothing new. The description does add useful context that the returned artifacts are free/MIT-licensed and include a sample repo URL, but no other behavioral traits (e.g., rate limits, whether anything is provisioned) are disclosed.

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?

Two short sentences plus a trailing 'Read-only.'. It is front-loaded and efficient, but the 'Read-only' fragment is redundant with the annotations and earns no 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 zero-parameter, read-only retrieval tool with no output schema, the description adequately tells the agent what will be returned (protocol + sample repo URL) and when to invoke it. Minor gaps remain around the exact return shape, but nothing critical is missing.

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 per the rubric the baseline is 4. There are no parameter semantics for the description to clarify.

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 (Return) and concrete resources (the MIT-licensed CommonRig orchestration protocol and a sample repository URL). The 'before buying' framing implicitly contrasts it with kit_buy_x402, but no sibling is named, so differentiation relies on inference.

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?

Gives a clear triggering condition: 'Use when the user wants to try CommonRig before buying.' This is a usable context cue, though it stops short of naming the alternative tools or stating exclusions.

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