Get specific data from a webpage using CSS selectors or text search.
AI agents call query to retrieve information from Web Search MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'query' tool retrieves and filters existing data from webpages without modifying, deleting, or executing anything. It performs passive data extraction using CSS selectors or text search, which is characteristic of a Read operation. There are no write, destructive, financial, or code execution implications.
From the tool's definition Tool description states it 'Get[s] specific data from a webpage using CSS selectors or text search.' This is a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get specific data from a webpage using CSS selectors or text search. It is categorised as a Read tool in the Web Search MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Web Search MCP Server MCP server in PolicyLayer and add a rule for query: 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 Web Search MCP Server. Nothing to install.
query 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 query 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 query. 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.
query is provided by the Web Search MCP Server MCP server (sthbryan/web-search-mcp-server). 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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