execute_code

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

No annotations provided, but description covers sandboxed environment, max timeout, and paid endpoint. Could mention side effects like file system access or network restrictions, but sandbox implies isolation.

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?

Three sentences with no redundancy. Every sentence provides essential 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?

Tool is simple; description covers key aspects. No output schema, but return value is implied. Could mention error handling or output format, but overall adequate.

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 covers all parameters (100% coverage). Description adds 'Python (default)' and 'Max 60s timeout', which are already in schema, and 'Paid endpoint' which is global context.

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?

Clearly states it executes code in a sandboxed E2B environment, supports Python and JavaScript, with max timeout and paid endpoint. Easily distinguishable from sibling tools.

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 explicit when-to-use statements, but the sibling tools are all different (non-execution), making context clear. Lacks any usage constraints or alternatives.

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