Search the web using DuckDuckGo and return the top results (title, URL, snippet).
AI agents call web_search to retrieve information from Claude Flow without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query against a public search engine and returns informational results. It retrieves data without modifying, executing external commands, deleting, or moving funds. The blast radius of misuse is minimal—an agent could retrieve potentially inappropriate or irrelevant search results, but cannot cause damage or irreversible changes.
From the tool's definition Tool name 'web_search' and description 'Search the web using DuckDuckGo and return the top results (title, URL, snippet)' indicates a retrieval operation with no side effects.
Attacks that exploit this kind of access
Search the web using DuckDuckGo and return the top results (title, URL, snippet). It is categorised as a Read tool in the Claude Flow MCP Server, which means it retrieves data without modifying state.
Register the Claude Flow MCP server in PolicyLayer and add a rule for web_search: 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 Claude Flow. Nothing to install.
web_search 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 web_search 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 web_search. 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.
web_search is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.