begin_batch

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

The description discloses the key atomicity behavior: write operations are committed when commit_batch fires. This is valuable context beyond a simple 'open' statement. However, it does not mention other behavioral aspects such as whether batches can be nested, what happens on abort, or any limitations (e.g., timeout or size caps). With no annotations, the description carries the full burden and only partially addresses it.

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 sentences with no fluff. The primary purpose is front-loaded, followed by a single key behavioral detail about atomic commit. Every word earns its place, making it highly concise and well-structured.

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?

Given there are no parameters and an output schema exists, the description covers the essential behavior of opening a batch and its atomic commit semantics. However, it does not explicitly clarify the relationship with sibling tools like abort_batch (which discards) or whether multiple batches can coexist, which could be important for correct usage. It is adequate but not fully complete.

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 has zero parameters and the schema coverage is 100% (there is nothing to document). Per the rubric, the baseline is 4 since the description doesn't need to explain parameters. It adds no parameter details because none exist.

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 clearly states the tool opens a batch session, specifying a specific verb and resource. It is distinct from sibling batch tools like commit_batch and abort_batch, though it doesn't explicitly name them. The purpose is unambiguous and easily understood by an agent.

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 guidance is provided on when to use this tool versus alternatives. It doesn't mention that it should be called before write operations to enable batching, nor does it state cases where batching is unnecessary or disallowed. The usage context is left entirely to inference.

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