Mặc định chạy nhanh bằng DuckDuckGo HTML; nếu kết quả chưa đủ tốt sẽ chuyển sang Playwright (Bing). Không dùng API key.
AI agents call search_web to retrieve information from Mcp Web Calc without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Web search is a read-only operation that retrieves information from the internet without side effects, permissions changes, data modification, or external execution beyond the search itself. The tool has no destructive, financial, or code-execution capabilities. Severity is low because search results are typically public information and the blast radius of misuse is minimal.
From the tool's definition Tool performs web search via DuckDuckGo and Bing (fallback), returning search results. Description indicates it 'runs quickly' and 'switches to Playwright' for better results, but fundamentally retrieves and queries data without modifying any state.
Attacks that exploit this kind of access
Mặc định chạy nhanh bằng DuckDuckGo HTML; nếu kết quả chưa đủ tốt sẽ chuyển sang Playwright (Bing). Không dùng API key. It is categorised as a Read tool in the Mcp Web Calc MCP Server, which means it retrieves data without modifying state.
Register the Mcp Web Calc MCP server in PolicyLayer and add a rule for search_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 Calc. Nothing to install.
search_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_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_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_web is provided by the Mcp Web Calc MCP server (khanhs-234/mcp-web-calc). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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