qt-mcp

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

With no annotations provided, the description carries full burden but offers minimal behavioral insight. It states this is a 'Get' operation (implying read-only), but doesn't disclose permissions needed, rate limits, side effects, or what the returned state includes. For a tool interacting with graphical widgets, more context about safety and behavior would be expected.

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 appropriately brief with two sentences: one stating the purpose and one explaining the parameter. It's front-loaded with the core function. However, the 'Args:' section formatting is slightly redundant with the schema, and more value could be packed into the limited space.

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 1 parameter with 0% schema coverage, the description adequately explains the input. With an output schema present, return values needn't be described. However, for a tool in a complex UI testing context with many siblings, more guidance on usage and behavior would improve completeness, especially since no annotations are provided.

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 meaningful context for the single parameter 'ref', explaining it's a reference to a widget containing a VTK render window. With 0% schema description coverage (schema only has title 'Ref'), this compensates well by clarifying the parameter's purpose and type, though it doesn't specify format or examples.

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 verb 'Get' and the resource 'VTK scene state', specifying it's from a PyVista/VTK widget. It distinguishes from siblings like 'qt_vtk_screenshot' (which captures images) by focusing on state information rather than visual output. However, it doesn't explicitly differentiate from other info-gathering tools like 'qt_widget_details' or 'qt_object_tree'.

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 minimal guidance: it mentions the tool is for VTK render windows in widgets, but offers no explicit when-to-use advice, no exclusions, and no alternatives. Given the many sibling tools for UI interaction and inspection, this lack of context leaves the agent guessing about when this specific tool is appropriate versus others.

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