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1WorldCapture

codex-mcp-agent

codex_execute

Execute a prompt using OpenAI Codex for general-purpose tasks, with a working directory and context for configuration.

Instructions

Execute prompt using codex for general purpose.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
promptYes
work_dirYes
ctxYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior1/5

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

No annotations provided, and the description fails to disclose any behavioral traits such as side effects, authentication requirements, rate limits, or what happens upon execution. The agent has no insight into the tool's safety or behavior.

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

Conciseness2/5

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

The description is a single short sentence, but this conciseness comes at the cost of necessary detail. It is under-specification rather than efficient communication.

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

Completeness1/5

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

Given the tool has 3 required parameters, a complex input, and an output schema but no annotations, the description is severely incomplete. It fails to provide essential context for correct invocation.

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

Parameters1/5

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

Schema description coverage is 0%. The description does not elaborate on any of the three parameters (prompt, work_dir, ctx), nor does it explain the complex Context object. The agent receives no additional meaning beyond the bare schema.

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

Purpose3/5

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

Description states 'Execute prompt using codex for general purpose', which is somewhat clear but vague. It does not distinguish from sibling tools codex_research and codex_review, leaving the agent guessing about the specific behavior.

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 on when to use this tool vs alternatives. The description provides no context about prerequisites, exclusions, or scenarios where codex_execute is preferred over codex_research or codex_review.

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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