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seleniumbase

SeleniumBase MCP

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by seleniumbase
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Python

manage_cookies

Inspect, clear, save, or restore browser cookies to preserve login sessions or reset website state during testing.

Instructions

Manage cookies for the current browser session.

Use this tool to inspect, clear, save, or restore browser cookies. Cookie management is useful for inspecting session state, preserving login sessions between browser runs, restoring previously saved sessions, or resetting website state during testing.

Args: action: - "get_all": Return all cookies currently available to the browser, including attributes such as name, value, domain, path, expiry, and security flags. - "clear": Delete all cookies from the current browser session. - "save": Save current cookies to filename. The file may be created or overwritten. - "load": Load cookies from filename into the current browser session. filename: Filesystem path used by save/load. Defaults to "cookies.txt". Ignored for get_all and clear.

Returns: "get_all": Current browser cookies. "clear": Confirmation that cookies were cleared. "save": Confirmation containing the destination filename. "load": Confirmation containing the source filename.

Security: Cookie data can contain authentication credentials, session identifiers, and other private information. Only inspect, save, load, or share cookies when explicitly authorized.

`filename` is passed to SeleniumBase's cookie persistence methods and
can access the filesystem available to the MCP server. Use only
trusted, authorized paths. The save action may overwrite an existing
file.

Notes: Loading saved cookies does not guarantee restoration of a login. Cookies may be expired, invalidated, domain/path restricted, or dependent on other browser state. Navigate to the relevant site when necessary so the browser has the appropriate origin for the cookies.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionNoget_all
filenameNocookies.txt
Install Server

TDQS

A4.7/5.0
Behavior5/5

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

With no annotations provided, the description itself discloses key behaviors: clearing deletes 'all cookies', saving may overwrite existing files, loading does not guarantee login restoration, and cookie data may contain sensitive credentials. This is strong behavioral transparency.

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

Conciseness4/5

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

The description is detailed but well structured into Args, Returns, Security, and Notes sections. Every section provides useful information, though the Returns section partially repeats action semantics already covered in Args.

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

Completeness5/5

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

For a tool with two parameters and no output schema, the description covers all necessary operational details: action outcomes, return descriptions, filename behavior, security considerations, and limitations of loading cookies. Nothing critical is missing.

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

Parameters5/5

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

The schema has 0% description coverage, and the description fully compensates by explaining each action value and the filename parameter, including its default value and when it is ignored. This gives the agent complete parameter meaning.

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

Purpose5/5

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

The description clearly states that the tool is for managing browser cookies and enumerates specific actions: inspect, clear, save, restore. This distinguishes it from sibling tools like manage_storage by focusing specifically on cookies.

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

Usage Guidelines4/5

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

It provides practical use cases such as preserving login sessions, restoring sessions, and resetting website state during testing. It does not explicitly mention alternatives or when not to use this tool, but the context is clear enough for correct selection.

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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