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mcp-stealth-chrome

mcp-stealth-chrome

by RobithYusuf
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

sessionstorage_get

Retrieve all keys or a specific key from the browser's sessionStorage to access temporary session data.

Instructions

Get sessionStorage — all keys or one.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "sessionstorage_get"
  }
}

Input Schema

NameRequiredDescriptionDefault
keyNo

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.4.12

TDQS

B3.1/5.0
Behavior2/5

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

With no annotations, the description carries the full burden. It only states the action but does not disclose whether the operation is read-only, requires specific permissions, or details behavior when key is missing or invalid.

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

Conciseness5/5

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

The description is extremely concise with a single sentence that front-loads the purpose. Every word is necessary, and there is no wasted text.

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

Completeness3/5

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

Given the presence of an output schema (not shown), the description may be sufficient for a simple getter. However, it lacks context on error handling and edge cases, and the schema has no parameter descriptions, so the description only partially compensates.

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

Parameters3/5

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

The description adds meaning to the 'key' parameter by explaining that omitting it retrieves all keys (null default) and a string retrieves a single key. However, it does not elaborate on the format or what the return values look like.

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

Purpose4/5

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

The description clearly states the tool gets sessionStorage, with the distinction of retrieving all keys or one key. It effectively conveys the core action and resource, and the name differentiates it from sibling tools like localstorage_get.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives (e.g., localstorage_get). The description does not mention when-not to use it or any prerequisites.

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

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