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 mentions returning 'artifact metadata' but lacks details on permissions required, whether the operation is destructive (e.g., modifies the guest file), rate limits, or error handling. This is inadequate for a tool that likely interacts with VM resources.

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 front-loads the core action. It avoids unnecessary words, though it could be slightly more informative without losing 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?

Given the complexity of VM operations and no annotations, the description is minimal. It benefits from having an output schema (so return values are covered elsewhere), but it fails to address critical aspects like behavioral traits, parameter meanings, or usage context, making it incomplete for safe and effective 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?

Schema description coverage is 0%, so the description must compensate by explaining parameters. It only vaguely references 'guest' and 'artifact' without defining what 'vm_id', 'guest_path', 'host_subdir', or 'timeout_sec' mean or how they affect the operation. This leaves key input semantics undocumented.

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 ('Copy a file artifact out of the guest') and the resource ('file artifact'), making the purpose understandable. It distinguishes from sibling 'guest_copy_in' by specifying directionality ('out of the guest'), though it doesn't explicitly differentiate from other tools like 'guest_dump_memory' or 'process_dump_core' that might also extract data.

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?

No guidance is provided on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., VM must be running), exclusions, or comparisons to siblings like 'guest_dump_memory' for memory extraction or 'process_dump_core' for core dumps, leaving usage context unclear.

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