get_open_item

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

With no annotations at all, the description carries the full behavioral burden and delivers little: it does not state that the call is read-only, does not say whether it errors or returns empty when no item is open, and gives no hint about the shape or size of the returned data.

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?

A single short sentence with the key constraint (the open item in the builder tab) front-loaded and no filler. Nothing is wasted.

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?

There is no output schema and no annotations, so the description is the only source of behavioral information — yet it says nothing about return values or the no-open-item edge case. For a state-reading tool this leaves a meaningful gap.

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 tool takes zero parameters, so there is nothing parameter-level for the description to explain beyond confirming that the target is implicitly the open item. Baseline 4 applies for a parameterless tool.

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?

States a specific verb ("Read") and a specific resource ("the chapter item currently open in the builder tab"), which tells an agent exactly what state is fetched. It does not explicitly contrast with the sibling open_item, so the read-vs-open distinction must be inferred from the verb alone.

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 phrase "currently open in the builder tab" implies a precondition, but there is no explicit when-to-use guidance, no statement of what happens when no item is open, and no named alternative among siblings such as open_item or get_course.

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