vcc_eval

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

No annotations are provided, so the description bears full responsibility. It does not disclose important behavioral traits such as potential side effects, error handling, execution guarantees, or the format of the output (despite an output schema existing). The claim 'send any Tcl command' lacks nuance about safety or state changes.

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 two sentences long, front-loads the core purpose, and uses the second sentence to reinforce the breadth of use. Every part contributes meaning without unnecessary detail.

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 complexity (an arbitrary command executor) and the presence of sibling tools, the description lacks critical details: parameter semantics for timeout_s, behavioral implications, and guidance on when to use this vs. specialized tools. The existence of an output schema reduces some burden, but gaps remain.

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 value for the 'tcl' parameter by explaining it accepts any Visualizer Tcl command and listing examples. However, it does not mention the 'timeout_s' parameter at all. With 0% schema description coverage, the description partially compensates but leaves one parameter 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 tool sends any Tcl command to Visualizer's command interpreter and provides specific examples (run, step, wave add, etc.), distinguishing it from the more specific sibling tools by calling it an 'escape hatch'.

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 says it can be used for any Visualizer Tcl command, implying it's a fallback. However, it does not explicitly say when to prefer specific sibling tools over this one, nor does it mention any prerequisites or limitations. The guidance is largely implicit.

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