Extract structured data from a URL: JSON-LD, Open Graph, meta tags, headings, links, images, tables.
AI agents call extract to retrieve information from Mcp Services without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The extract tool performs passive data retrieval from web pages—parsing and returning structured metadata and content. It has no side effects, does not modify data, execute code, delete anything, or affect financial systems. This is a classic Read operation with minimal blast radius if misused by an AI agent (worst case: information disclosure of publicly accessible web content).
From the tool's definition Tool description explicitly states 'Extract structured data from a URL' with operations limited to retrieval: 'JSON-LD, Open Graph, meta tags, headings, links, images, tables.' These are all read-only data extraction operations with no modification, deletion,…
Attacks that exploit this kind of access
Extract structured data from a URL: JSON-LD, Open Graph, meta tags, headings, links, images, tables. It is categorised as a Read tool in the Mcp Services MCP Server, which means it retrieves data without modifying state.
Register the Mcp Services MCP server in PolicyLayer and add a rule for extract: 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 Services. Nothing to install.
extract 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 extract 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 extract. 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.
extract is provided by the Mcp Services MCP server (san-npm/mcp-services). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
extract is one line of Mcp Services's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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