Check Tinkercad sign-in

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

Adds real context beyond the readOnlyHint annotation: the tool has a visible side effect (launches the dashboard in the server's Chrome profile), it depends on an existing browser profile, and failure requires a manual one-time login step the agent cannot perform itself. Missing only latency/error behavior.

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 sentences, zero waste: the first covers action and result, the second covers the failure/remediation path. Front-loaded with the primary behavior.

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?

With no parameters, no output schema, and a single annotation, the description covers what the agent needs: what happens, what is reported, and the human-in-the-loop fix if unauthenticated. It could mention how the signed-in result is surfaced, but the gap is minor.

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 and the schema coverage is moot. Baseline 4 applies.

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 action (opens the Tinkercad dashboard in the server's Chrome profile) and the specific result it reports (whether you are signed in). The auth-status focus clearly distinguishes it from the parts/circuit siblings, though no sibling is named explicitly.

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?

Usage is implied — check sign-in status before doing Tinkercad work — and it gives a concrete remediation path (`npm run login`). However it never states explicitly when to call it (e.g. 'call this first if other tools fail with auth errors') or what to do with the answer.

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