extract

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

With no annotations provided, the description carries the full burden of behavioral disclosure, but it only states that 'Page results stay local to the Agent.' It does not disclose whether extraction mutates browser state, requires authentication, how failures surface, or what the output shape is — a significant gap for a tool with zero annotation coverage.

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 filler; the purpose statement is front-loaded and the locality caveat is a useful second beat. Efficient prose overall, though the brevity edges toward under-specification, which is penalized in other dimensions rather than here.

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 no output schema, no annotations, and 2 params at 0% coverage, the description must compensate for all missing context but does not. An agent cannot determine what the tool returns, how to format the required session_id, or what side effects (if any) extraction has on the browser session — leaving it incomplete for a mutating browser operation.

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% and the description references neither parameter. session_id is required but its meaning (how to obtain it, what session it refers to) is completely unexplained, and request_id is equally opaque. The description adds zero value over the bare schema, which itself provides no semantics.

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?

'Run the local Chrome browser extract operation' clearly ties the verb (extract) to a resource (local Chrome browser), and the sibling set (navigate, observe, click, fill, scroll) makes it distinct as the data-pulling tool. However, it stops short of specifying what kind of extraction happens (DOM text, attributes, structured data?), so it's clear but not fully precise.

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 given on when to use extract versus observe (which could also retrieve page data), nor are prerequisites stated — e.g., whether the agent must first call navigate to establish a session. The lone phrase about results staying local hints at context but provides no when/when-not direction.

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