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

No annotations are provided, so the description must disclose behavior. It reveals that steps run sequentially in Playwright, lists supported actions, and explains variable resolution from the secrets vault—useful runtime semantics. However, it omits creation-time behaviors such as validation, storage, or response type.

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 compact—four sentences, front-loaded with the purpose, and each sentence provides distinct value (execution model, supported actions, variable resolution). No filler or redundancy.

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 tool with nested steps and no output schema, the description provides solid context: sequential execution, supported actions, and variable resolution. It falls short by not explaining what the create operation returns or explicitly noting that it does not run the journey (trigger_journey does). Slightly more completeness would earn a 5.

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%, so the baseline is 3. The description adds value beyond property descriptions by enumerating valid actions and illustrating variable syntax ({{LOGIN_EMAIL}}), helping users construct the steps array correctly.

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 a specific verb and resource: 'Create a custom browser test flow for a target.' It distinguishes from other create_* siblings by emphasizing browser test flow and Playwright execution, making it evident this is for creating a journey.

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 rather than explicit. The description explains what the tool does but does not state when to use it versus alternatives like trigger_journey or update_journey, nor any exclusions or prerequisites.

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