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select_option

Select a dropdown option by CSS selector and value to automate form choices in an existing Chrome session via TabWeave MCP.

Instructions

Select options (aliases)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueYes
selectorYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv4.3.0

TDQS

D1.3/5.0
Behavior1/5

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

No annotations are provided, so the description carries the full behavioral disclosure burden. It does not explain whether selecting an option mutates page state, whether it requires focus or visibility, what happens on failure, or what the return value is.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely short and front-loaded, but it is under-specified rather than concise. The single sentence does not earn its place because it adds almost no information beyond the tool name.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no annotations, no output schema, and 0% schema description coverage, the description is completely inadequate for a two-required-parameter interaction tool. It leaves the agent without the information needed to invoke the tool correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% for two required parameters. The description does not clarify what 'selector' identifies or what 'value' should contain, so an agent gets no semantic help beyond the bare parameter names.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Select options (aliases)' essentially restates the tool name and adds only the cryptic word 'aliases'. It does not distinguish this tool from siblings like select, set_checked, or toggle_checkbox, so an agent cannot confidently tell what specific operation this performs.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool, when not to use it, or which sibling tool it replaces. The description provides no context for choosing select_option over select, checkbox, or fill.

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