mcp-qemu-lab

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 states the action ('detach and mark inactive'), implying a state change, but lacks details on effects (e.g., whether it stops debugging, releases resources, or impacts other sessions), permissions needed, or error handling. This leaves significant gaps in understanding the tool's 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 a single, efficient sentence that directly states the tool's action without unnecessary words. It's front-loaded with the core purpose, making it easy to parse quickly, and every part of the sentence contributes to understanding the tool's function.

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 (state-changing operation with one parameter) and the presence of an output schema (which reduces the need to describe return values), the description is minimally adequate. However, it lacks details on behavioral effects and usage context, making it incomplete for safe and effective use without additional inference or documentation.

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 adds no parameter-specific information beyond what the input schema provides (a single required 'session_id' with 0% schema description coverage). Since there's only one parameter and the description doesn't elaborate on its format or meaning, the baseline score of 3 is appropriate, as the schema minimally documents the parameter without additional semantic value from the description.

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 action ('detach and mark inactive') and resource ('debugger session'), making the purpose understandable. However, it doesn't explicitly differentiate from sibling tools like debugger_attach or debugger_continue, which would require more specific context about when detachment occurs versus continuation.

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., needing an active debugger session), exclusions, or comparisons to siblings like debugger_continue or debugger_attach, leaving the agent to infer usage from context alone.

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