fiverr_launch_login

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

The description says the window is 'interactive' and 'visible', which is useful because it signals that the user will be involved and that headless operation is not possible. However, it does not disclose whether this requires user interaction each time or how the session is validated. No annotations are provided, so the description carries the burden; this is adequate but not rich.

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 concise, a single sentence with no verbose filler, and it front-loads the key action and purpose. It loses a point for not elaborating on 'persist the session', which might be ambiguous, but overall it 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?

Given that the tool has no parameters and an output schema exists (which likely describes the result), the description is fairly complete. It tells the agent that this opens a visible interactive window and persists the session, which is enough to invoke it correctly. However, it could mention that this is a prerequisite for other Fiverr tools, but that is not strictly necessary.

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, so the description doesn't need to explain any parameter semantics. The baseline for zero parameters is 4, and the description correctly avoids fabricating any parameter details. It could potentially explain that no input is needed, but that is obvious from the schema.

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 (launch interactive visible window), the resource (Fiverr), and the goal (log in and persist the session). It is specific enough to distinguish from siblings like fiverr_get_status and fiverr_update_profile, though it could be more explicit about what 'persist' means.

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?

The description implies that this tool is for initiating login and session persistence, which is a prerequisite for other tools. However, it does not explicitly state when to use it versus alternative tools, nor does it mention when not to use it (e.g., when a session already exists).

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