openBuilderInterface

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

There are no annotations, so the description carries the full behavioral burden. The first sentence frames the action as opening an interface, but the description does not explicitly state that this tool itself does not execute code; the editor merely allows future user-driven execution. That boundary is important given the sibling executeBuilderCode.

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 front-loaded sentences with no filler. The first sentence carries the core operation, and the second adds purpose and context. Every sentence earns its place.

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 zero-parameter, low-complexity tool, the description provides enough context: what it opens, where, and why. It is not fully complete because it does not clarify the relationship with executeBuilderCode, specifically that this tool only opens the editor rather than running scripts itself.

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?

The schema has zero parameters, and the description cannot add parameter-level meaning there is nothing to document. The baseline for a zero-parameter tool is 4, and the description's workflow context is sufficient.

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?

The description states a specific verb ('Open') and a precise resource ('PTBuilder code editor interface in Packet Tracer'), and explains the editor's purpose. This is clearly distinct from sibling tools like executeBuilderCode, which run code rather than present the editor.

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?

The description gives clear context—this is a web editor for writing and executing JavaScript—so an agent can infer when to use it. However, it never explicitly says when not to use it or that code execution belongs to executeBuilderCode, so the alternative routing is left to inference.

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