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get_storage

Retrieve local or session storage values by key from a connected Chrome/Chromium instance via TabWeave MCP, enabling web app data inspection.

Instructions

Get Storage (alias)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
keyNo
typeNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv4.3.0

TDQS

D1.1/5.0
Behavior1/5

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 and delivers nothing. It does not say whether the read is scoped to a key, what happens when the key is absent, or what form the returned value takes.

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 text is short, but this is under-specification rather than conciseness — brevity here reflects a missing description, not an efficient one.

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?

A two-parameter read tool with no annotations, no output schema, and 0% parameter coverage should explain key scoping, the storage-type enum, and the return shape. None of that is present.

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?

Two parameters exist (key, and a type enum of local/session) with 0% schema description coverage, and the description supplies no meaning for either. The enum values in particular are left completely unexplained.

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

Purpose1/5

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

"Get Storage (alias)" merely restates the tool name and adds a parenthetical that conveys nothing. It does not state what storage is read from, what the retrieval does, or how it differs from siblings like storage, get_config, or get_cookies.

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 indication of when to use this tool versus the closely related siblings storage, set_storage, clear_storage, or get_cookies. No prerequisites, no exclusions, no context at all.

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