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RS-Nocsi

codex-cua-mcp

by RS-Nocsi

perform_secondary_action

Trigger secondary actions such as right-click, expand, or collapse on interface elements to access context menus or change component states.

Instructions

Perform a secondary action on an element (e.g., right-click menu, expand)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesAction name (e.g., "Raise", "Expand", "Collapse")
windowYesWindow object
element_indexYesElement index from accessibility tree
Behavior2/5

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It does not mention side effects, prerequisites (e.g., element focus), or whether the action is state-changing. The description is too brief to reveal important behavioral traits.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence that efficiently communicates the tool's purpose. It is front-loaded and to the point, but could benefit from slightly more detail without becoming verbose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (3 parameters, nested object, no output schema), the description is incomplete. It does not explain what constitutes a 'secondary action' comprehensively, list possible actions, or clarify the return value (if any). The user is left guessing about supported actions and behavior.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 100% schema description coverage, the schema already documents all parameters. The description adds value by providing example action strings ('Raise', 'Expand', etc.), but does not elaborate on the window object structure or element_index beyond the schema. Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's function ('perform a secondary action') and provides examples ('e.g., right-click menu, expand'), making it distinct from sibling tools like click, drag, and scroll. However, the term 'secondary action' is somewhat vague and could be more precise.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives. The sibling list suggests other interaction tools, but the description does not specify conditions or exclusions for using perform_secondary_action.

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

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