browser_init

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

No annotations are provided, so the description must carry the behavioral transparency burden. It mentions 'anti-detection features' and 'automatic Chrome path detection,' but does not disclose side effects, idempotency, resource cleanup, or what happens on repeated calls. This is insufficient for an initialization tool.

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 a single concise sentence that front-loads the primary action and key differentiators. Every word earns its place with no 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 complex tool with 7 parameters, nested objects, and no output schema, the description is thin. It does not explain return values, the need to call browser_close, or the lifecycle implications of initialization. The schema provides parameter details, but the description lacks broader context for a task-level agent.

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% with detailed parameter descriptions, so the baseline is 3. The description adds marginal context (auto path detection relates to chromePath), but does not substantively add meaning beyond 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 uses a specific verb 'Initialize' and resource 'browser instance', and distinguishes itself from sibling tools by highlighting anti-detection features and automatic Chrome path detection. This clearly states what the tool does and sets it apart from navigation and automation tools.

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 this is a setup step for browser automation, but does not explicitly state when to call it relative to other tools or provide exclusions/alternatives. The context suggests it should be used first, but the description itself lacks explicit usage guidance.

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