Perform a deterministic browser batch

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

The description adds meaningful behavioral detail beyond the annotations: it stops on failure, never retries a possible write, and scopes execution to one write lease. This complements the destructiveHint=true and idempotentHint=false annotations instead of merely repeating them. It does not fully explain what a write lease entails, but the added failure/retry semantics are valuable.

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?

The description is a single, tightly worded sentence that front-loads the core capability and key constraints. Every clause adds information, with no filler or repetition. It could be more detailed, but as far as conciseness and structure, it is well organized.

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 the complex actions schema, four required parameters, and no output schema, the description is too thin. It omits return values, error behavior beyond stopping, lease semantics, and any explanation of target_epoch or scope_revision. This leaves significant gaps for an agent deciding how to call the tool correctly.

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 0% description coverage and the tool description does not explain target_id, target_epoch, scope_revision, or the structure of actions. The only parameter-related hint is the 1-20 action count, which is far from sufficient for an agent to construct a valid request. The description fails to compensate for the schema's lack of parameter documentation.

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 executes a batch of 1-20 browser actions under a single write lease, with specific failure semantics. This goes beyond the name and title, conveying scope and constraints. However, it does not explicitly distinguish itself from sibling tools like 'act' or 'open_click_verify', though the batching concept is implicit.

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 implies batching multiple actions together but gives no explicit guidance on when to use this tool versus alternatives like 'act' or 'open_click_verify'. It does not state prerequisites, when not to use it, or how to choose between batch and single-action tools.

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