MCP J-Link Server

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 only states what the tool does ('取得 RTT 緩衝區狀態資訊') without describing the behavior: whether it's read-only or has side effects, what the output contains (though an output schema exists), error conditions, or dependencies on other tools like 'rtt_start'. For a tool with zero annotation coverage, this is insufficient.

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, efficient sentence in Chinese: '取得 RTT 緩衝區狀態資訊.' It's front-loaded with the core purpose, has zero wasted words, and is appropriately sized for a simple tool. Every word earns its place by specifying the action and target.

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 simplicity (0 parameters, output schema exists), the description is minimally adequate. However, it lacks context about RTT (Real-Time Transfer) or how this fits with sibling tools like 'rtt_start'/'rtt_stop'. With no annotations and many sibling tools, more guidance would help the agent understand the tool's role in the broader debugging workflow.

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 tool has 0 parameters, and the input schema has 100% description coverage (though empty). The description doesn't need to explain parameters, and it correctly doesn't mention any. A baseline of 4 is appropriate for zero-parameter tools, as there's no parameter semantics to document.

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 the tool '取得 RTT 緩衝區狀態資訊' (gets RTT buffer status information), which provides a clear verb ('取得' - get) and resource ('RTT 緩衝區狀態資訊' - RTT buffer status information). However, it doesn't distinguish this from sibling tools like 'jlink_get_status' or 'rtt_start'/'rtt_stop', leaving ambiguity about when to use this specific RTT status tool versus other status-related 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 provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., whether RTT must be started first), compare it to 'jlink_get_status', or specify scenarios where RTT buffer status is needed versus other operations. This leaves the agent without context for tool selection among the many sibling tools.

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