DrissionPageMCPServer_Modified

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

With no annotations provided, the description carries full burden. It adds valuable behavioral context about timeout control (default 30 seconds), which isn't evident from the schema. However, it doesn't disclose other important behaviors like error handling, performance characteristics, or what happens when timeout is reached.

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 concise with two brief sentences. The first states the core purpose, the second adds timeout information. There's no unnecessary verbiage, though the structure could be slightly improved by front-loading the timeout information more clearly.

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 has an output schema (which presumably describes the binary data return), the description doesn't need to explain return values. However, for a screenshot tool with a sibling alternative and 0% schema description coverage, the description should do more to explain parameter usage and differentiation from 'take_screenshot'.

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 provides no information about the 'format' parameter mentioned in the schema. The description doesn't explain what format options are available, default behavior, or how format affects the binary data output.

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 '获取截图二进制数据' (get screenshot binary data), which is a clear verb+resource combination. However, it doesn't distinguish this tool from its sibling 'take_screenshot' - both appear to capture screenshots, making the purpose somewhat vague in relation to alternatives.

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 no guidance on when to use this tool versus the 'take_screenshot' sibling tool. It mentions timeout control but doesn't explain why one would choose this binary data retrieval over the presumably simpler 'take_screenshot' tool.

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