safari_native_hover

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

Discloses key behaviors: real cursor movement, dwell mechanism, cursor restoration, and requirement for visible window. With no annotations, this is thorough, though could mention potential interference with user input.

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?

Four sentences front-loading purpose, then usage, then behavior. No redundant or irrelevant information.

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?

Covers purpose, usage, and key behaviors adequately for a hover tool. Missing return value explanation, but no output schema implies minimal return. Sufficient for intended use.

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 coverage is 100%, so baseline is 3. Description adds limited extra meaning beyond the schema (e.g., dwell purpose). No significant semantic enrichment.

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?

Explicitly states 'OS-level mouse hover via macOS CGEvent' and distinguishes from JS hover siblings. Unambiguously describes what tool does.

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?

Explicitly states when to use (obfuscated UIs, Discord server sidebars) and gives post-hover actions (safari_wait_for or safari_evaluate). Clearly differentiates from JS-based alternatives.

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