mouse_up

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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses nothing: not the default button, whether a prior mouse_down is required, whether it blocks, or what it returns. "(alias)" hints that it maps to another operation but doesn't say which or how behavior differs.

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 words plus a parenthetical is under-specification rather than conciseness. Nothing is front-loaded beyond the bare action name, and no sentence earns explanatory value.

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 UI-mutation tool with no annotations, no output schema, and an undocumented parameter, the description is far too thin. An agent lacks the state, preconditions, and default behavior needed to call it confidently alongside mouse_down and click.

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?

There is one parameter (button) with 0% schema description coverage and only an enum backing it; the description adds no meaning about default value, valid usage, or how button interacts with a preceding mouse_down. It leaves the agent to infer that omitting button defaults to left.

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?

"mouse release" names a specific action, so an agent can infer it releases a mouse button, but the parenthetical "(alias)" is opaque — it doesn't say what it aliases or how it differs from mouse_down, click, or mouse. The purpose is guessable but not explicitly stated as a verb+resource with scope.

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?

No indication of when to use this instead of the adjacent siblings mouse_down, mouse, click, or hover. The only hint is the vague "(alias)", which gives no selection criteria for an agent choosing among mouse tools.

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