set_virtual_cam

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

With no annotations, the description must fully disclose behavioral traits. It only states the core action without mentioning side effects, idempotency (e.g., what happens if already started), or potential impact on other operations like streaming. This is insufficient for a control tool.

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 sentence, front-loaded with the core action, earning its place. However, it is too brief for a tool with two parameters and no other documentation, sacrificing completeness for 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 0% schema description coverage, lack of annotations, and absence of output schema, the description is incomplete. It does not cover the 'dry_run' parameter, returns nothing about what the tool outputs after success/failure, and lacks error handling context.

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 explain both parameters. It implicitly clarifies the 'active' parameter (true=start, false=stop) but omits any explanation of 'dry_run', leaving its purpose unclear. This is a significant gap for an agent.

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 tool's function: starting or stopping the virtual camera via a boolean parameter. The verb 'Start' and 'stop' combined with the resource 'virtual camera' is unambiguous and distinguishes it from sibling tools that deal with scenes, audio, or streaming.

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 does not mention prerequisites (e.g., virtual camera must be enabled in settings), nor does it indicate that it should not be used when streaming or recording, which could be relevant context for an AI agent.

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