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yokingma

OneSearch MCP Server

one_search

Search the web and retrieve SERP results including URL, title, and description. Filter by language, category, and time range.

Instructions

Search and retrieve content from web pages. Returns SERP results by default (url, title, description).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
queryYesSearch query string
limitNoMaximum number of results to return (default: 10)
languageNoLanguage code for search results (default: auto)
categoriesNoCategories to search for (default: general)
timeRangeNoTime range for search results (default: all)
Behavior3/5

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

The description states it returns SERP results (url, title, description), which is helpful. However, with no annotations, it lacks details on pagination, rate limits, or blocking behaviors. It adequately covers the basic return value but could be more transparent.

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 two sentences, front-loading the purpose. Every sentence adds value with no redundancy or filler.

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

Completeness2/5

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

Given the absence of an output schema and the presence of 5 parameters (including enums for categories and timeRange), the description does not fully explain the usage of these parameters or the structure of the response beyond basic SERP fields. It feels incomplete for an agent to use effectively.

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?

Input schema coverage is 100%, so the schema already describes all parameters. The description adds no extra meaning beyond what the schema provides.

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 searches and retrieves content from web pages and returns SERP results with URL, title, and description. It is specific but does not explicitly distinguish itself from sibling tools like one_map or one_scrape.

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. No when-not-to-use or prerequisite information is given.

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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