mcp-qemu-lab

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states this is a 'Set' operation (implying mutation) but doesn't describe what happens when a breakpoint is set, whether it's persistent across sessions, what permissions are needed, or what the response looks like. The mention of 'symbol or address' is helpful but insufficient for a mutation tool with zero annotation coverage.

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 extremely concise (one sentence) with zero wasted words. It's front-loaded with the core action and includes helpful parenthetical clarification. Every element earns its place, making it efficient despite its brevity.

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 this is a mutation tool with 2 parameters (0% schema coverage), no annotations, but with an output schema, the description is minimally adequate. The output schema will handle return values, but the description lacks crucial context about session requirements, breakpoint behavior, and parameter formats that would be needed for confident tool invocation.

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?

With 0% schema description coverage for both parameters, the description doesn't explain what 'session_id' or 'location' mean, what format they should be in, or how they relate to the 'symbol or address' mentioned. The description mentions breakpoint types but doesn't connect this to the 'location' parameter, leaving significant gaps in parameter understanding.

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 ('Set breakpoint') and target ('for a debugger session'), with the parenthetical '(symbol or address)' providing useful specificity about what types of breakpoints can be set. However, it doesn't explicitly distinguish this tool from potential alternatives like 'debugger_continue' or 'debugger_detach' among the sibling 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, nor does it mention prerequisites like needing an active debugger session. While the context implies it's for debugging sessions, there's no explicit when/when-not guidance or reference to sibling tools like 'debugger_attach' which might be required first.

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