CloakMCP

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions that the tool 'Returns an updated snapshot', which adds some behavioral context about the output. However, it doesn't disclose important traits like whether this requires an active browser session, what happens if no forward history exists, or any performance considerations. For a navigation tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 appropriately sized with two sentences: one stating the purpose and behavior, and another documenting the parameter. It's front-loaded with the core functionality. While efficient, the parameter documentation could be integrated more seamlessly rather than as a separate Args section.

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 there's an output schema (which should document the return format), the description doesn't need to explain return values in detail. However, for a browser navigation tool with no annotations and minimal parameter explanation, the description should do more to explain the operational context - what constitutes 'forward' navigation, how this relates to browser state, and what happens in edge cases. It's adequate but has clear gaps.

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 description includes an Args section that documents the single parameter 'page_id: Target page ID.' With schema description coverage at 0%, this parameter documentation in the description is essential. However, it doesn't add much meaning beyond what's implied by the parameter name - it doesn't explain what a page ID is, how to obtain it, or format requirements. The description compensates for the schema gap but minimally.

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 tool's purpose: 'Navigate forward in browser history' with the specific verb 'Navigate' and resource 'browser history'. It distinguishes from siblings like cloak_back (backward navigation) and cloak_navigate (general navigation), but doesn't explicitly mention these distinctions. The description is specific about the action but could be more explicit about sibling differentiation.

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 usage context through 'Navigate forward in browser history', suggesting it should be used when there's forward history available. However, it doesn't provide explicit guidance on when to use this vs. alternatives like cloak_back or cloak_navigate, nor does it mention prerequisites or exclusions. The context is implied but not clearly articulated.

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