cursor_position

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

Description reveals important behavioral detail about coordinate reference (screenshot vs logical points), which is not covered by missing annotations. It adds value beyond the schema, though could mention stability or performance characteristics.

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?

Two sentences with no excess. The first sentence states purpose, the second adds critical qualification. Every word earns its place.

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?

For a parameterless tool with no output schema, the description covers purpose, coordinate system, and conditional behavior. No 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?

With zero parameters and 100% schema coverage, the baseline is 4. The description correctly adds no redundant parameter info, fulfilling its role.

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?

Description uses clear verb 'Get' and specific resource 'current mouse cursor position', with additional distinction between screenshot-dependent coordinate systems. This clearly differentiates it from sibling tools like mouse_move or click actions.

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?

Description implies usage for querying cursor position but provides no explicit comparison with sibling tools or guidance on when not to use it. It lacks alternatives or contextual cues.

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