CloakMCP

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

With no annotations provided, the description carries the full burden and does well by disclosing key behaviors: auto-waits for page settlement (network idle + DOM stable), handles Cloudflare challenges with extra wait time, and returns an updated snapshot. However, it lacks details on error handling, rate limits, or authentication needs, which could be important for a navigation 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 front-loaded with the core purpose and key behaviors in the first sentence, followed by specific handling details and a clear Args section. Every sentence adds value without redundancy, making it efficient and well-structured for quick understanding.

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 the tool's moderate complexity (navigation with auto-wait and Cloudflare handling), no annotations, 0% schema coverage, but an output schema exists (implied by 'Returns an updated snapshot'), the description is mostly complete. It covers purpose, behavior, and parameters, but could benefit from more context on errors or prerequisites, though the output schema reduces the need to explain return values.

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 description coverage is 0%, so the description must compensate. It lists the three parameters (page_id, url, timeout) and provides basic semantics (e.g., 'Target page ID', 'URL to navigate to', 'Navigation timeout in milliseconds'), but does not add deeper meaning like format constraints, examples, or edge cases. This is adequate but minimal, meeting the baseline for low coverage.

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 specific action ('Navigate to a URL') and distinguishes it from siblings by mentioning auto-waiting for page settlement and handling Cloudflare challenges, unlike tools like cloak_back or cloak_forward which imply navigation but without these details. It specifies the resource (a page via page_id) and outcome (returns an updated snapshot).

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 provides clear context for when to use this tool—for navigating to URLs with auto-wait and Cloudflare handling—but does not explicitly state when not to use it or name alternatives. For example, it doesn't clarify if cloak_back/forward are for browser history navigation versus this direct URL navigation, leaving some ambiguity.

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