browser_act

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

With no annotations, the description carries the behavioral disclosure burden. It clearly discloses that operations execute in order, enumerates the supported operation shapes, and states that a fresh element table is returned. It does not cover partial-failure behavior or whether a click can cause navigation, but the core side effects are visible.

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 front-loaded sentence that states the behavior first and then provides a compact, unambiguous grammar for the operations array. There is no filler or repetition of schema field names.

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?

It covers the core mechanics and the return value, but it leaves some operational context implicit: element refs presumably come from a prior observation, tabId semantics are unspecified, and error or partial-failure behavior is not addressed. An agent can likely call it correctly in simple cases, but must infer these assumptions.

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 description coverage is 0%, but the description compensates by defining the required `ops` parameter as a precise union of six operation shapes. The optional `tabId` is only implied by 'target tab' and left undocumented, which is a minor gap given its straightforward meaning.

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 action (run a list of operations), a target (the tab), an ordering constraint, and a concrete outcome (return the fresh element table). The enumerated operation types make it clearly distinct from the sibling tools like browser_observe and browser_navigate.

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 this tool is for batching tab interactions, but it never explicitly states when to use it over alternatives or what prerequisites exist (e.g., an already-open tab or a prior element observation). No exclusions or when-not-to-use guidance is provided.

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