Open, click, and verify an allowed page

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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the mutation risk is covered. The description adds the blocking and CDP-disabled constraints, which are useful, but doesn't disclose failure behavior, whether new tabs are allowed (though new_target param exists), or how verification is performed. It doesn't contradict annotations and adds moderate context, warranting a 3.

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 primary action is front-loaded, and the constraints are stated compactly. Every sentence earns its place; no redundant information.

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 complexity (8 params, nested objects, no output schema), the description is far too brief. It doesn't explain the 'ready' condition, how to specify the click target's role and name, how 'expect' works, what 'new_target' does, or the meaning of timeout_ms. An agent would need to infer much from the schema alone, which has no descriptions. This leaves the tool under-documented for correct invocation.

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 coverage is 0%, so the description must explain parameters. It vaguely references click (via 'exactly click one visible button/link/tab') and expect (via 'prove a new URL/text condition'), but doesn't elaborate on the structure of these objects, nor does it mention ready, trace, target_id, new_target, or timeout_ms. For a tool with 8 parameters and nested objects, this is a significant gap.

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 precise action sequence (open, exactly click one visible button/link/tab, verify a URL/text condition) and distinguishes itself from siblings like open_url (which only opens) and verify (which only verifies). The verbs are specific and the resource is an allowed page, making its purpose unmistakable.

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 explicitly says what actions it blocks (risky, sensitive, form, popup, immediate write-network) and that it's disabled for CDP, giving clear exclusions. It implies it's for a single combined open-click-verify operation but doesn't name alternative sibling tools or when to prefer them, so it's clear but not fully exhaustive.

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