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VitexSoftware

mcp-server-webdriver

browser_clear_storage

Remove a specific key or clear all data from localStorage or sessionStorage in a web browser.

Instructions

Remove one key or clear all entries from localStorage or sessionStorage.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
keyNoSpecific key to remove. Empty = clear all entries.
storageNo'local' for localStorage (default) or 'session' for sessionStoragelocal

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

Annotations already declare readOnlyHint=false, so the write behavior is clear. The description adds no extra behavioral context beyond the schema, such as irreversible actions or permissions. For a simple destructive operation, it's adequate but not enriched.

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?

A single, focused sentence with no extraneous words. Every part adds value.

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 simple tool with full schema coverage and an output schema, the description is complete. It covers the operation, parameters, and provides enough context for safe usage.

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?

Schema coverage is 100% with descriptions for both parameters. The description adds minor clarification ('Empty = clear all entries') but doesn't significantly enhance understanding beyond the schema. Baseline 3 is appropriate.

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 the action (remove/clear) and the target (key or all entries from localStorage or sessionStorage). It effectively distinguishes from siblings like browser_get_storage and browser_set_storage.

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

Usage Guidelines3/5

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

The description implies usage for clearing storage but provides no explicit guidance on when to use this tool versus alternatives like browser_get_storage or browser_set_storage. No when-not or context clues.

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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