os_apps_render_boundary_explorer

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is known. The description adds no extra behavioral context such as what 'open' entails or any side effects. It does not contradict the annotations, but it contributes nothing beyond them.

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, very short sentence. While it is concise in length, it is severely under-specified—it provides almost no useful information for an agent. This is under-specification rather than good conciseness.

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?

With 10 optional parameters, no parameter descriptions, and a widget whose purpose is unexplained, the description is grossly inadequate. An agent cannot know what the boundary explorer widget does, what inputs to provide, or what output to expect. The presence of an output schema does not compensate for the complete lack of explanatory content.

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 input schema has 10 parameters with zero descriptions (schema_description_coverage=0%). The tool description provides no information about any of these parameters, leaving the agent completely in the dark about what 'level', 'focusName', 'initialLat', etc. mean. The description fails to compensate for the lack of schema documentation.

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 states a clear verb ('Open') and a specific resource ('MCP-Apps boundary explorer widget'). However, it does not differentiate from sibling render tools that likely follow the same pattern, and it gives no clue about what the widget actually does. This is clear but not distinguishing.

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?

There is no guidance on when to use this tool versus the many sibling render tools or other tools. The description only states the action without any context about appropriate use cases, alternatives, or exclusions.

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