connect

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

With no annotations, the description carries the full responsibility for behavioral disclosure. It discloses the main side effect: 'This opens the user's browser to the consent screen.' It also provides context about automatic triggering from other tools. However, it does not mention what happens after successful authentication (e.g., session token, return value), which is a minor gap for a tool with no output 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 description is exactly three sentences, each with a distinct purpose: action, trigger, and exclusions. It is front-loaded with the core behavior in the first sentence, and every sentence adds value without redundancy. There is no fluff or repetition of schema information.

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 tool with no output schema, the description covers the essential aspects: what it does, when to use it, and a key side effect. The only missing piece is confirmation of what the tool returns after completion, but given the simplicity and the clear triggers, the description is sufficiently complete. It even explains why it is often unnecessary, which is valuable contextual guidance.

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 has zero parameters, and the schema confirms this with an empty properties object. The description correctly does not attempt to explain parameters. With no parameters, there is nothing for the description to add, and the baseline score of 4 is appropriate.

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 clearly states the action: 'Explicitly start the Vibe Marketing sign-in flow.' The verb 'start' and the specific resource 'sign-in flow' make the purpose unambiguous. It also distinguishes this tool from content-focused siblings like get_draft or create_draft by noting that other tools auto-trigger this flow, so it is a unique utility tool.

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?

Explicit usage guidance is provided: 'Use this when the user says something like "connect to vibe marketing" or after `disconnect`.' It also gives an exclusion: 'Most other tools will trigger this automatically if not already connected, so you usually don't need to call it directly.' This clearly states when to use and when not to, fulfilling the dimension fully.

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