Searches the web for information related to the given query.
AI agents call search_on_web to retrieve information from MCP Web Utilities Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs read-only queries against web search engines and returns results. It retrieves information without creating, modifying, deleting, or executing any data or operations. The blast radius of misuse is minimal—an agent could return irrelevant or misleading search results, but cannot cause destructive harm. Low severity reflects the benign nature of internet searching.
From the tool's definition Tool description states it 'Searches the web for information' and server description emphasizes 'web searches via DuckDuckGo' and 'retrieve cleaned page text for analysis'. The verb 'search' and 'retrieve' indicate data retrieval without side effects.
Attacks that exploit this kind of access
Searches the web for information related to the given query. It is categorised as a Read tool in the MCP Web Utilities Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Web Utilities Server MCP server in PolicyLayer and add a rule for search_on_web: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP Web Utilities Server. Nothing to install.
search_on_web is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the search_on_web rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for search_on_web. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
search_on_web is provided by the MCP Web Utilities Server MCP server (rocwodev/mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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