extract_form_data
Extract form structure and current values, including hidden fields. By default returns all matching forms; pass formIndex to inspect a single form. Password values are masked unless maskPasswords is set to false.
This record as markdown: /tools/1600822305-js-reverse-mcp/extract-form-data.md
What extract_form_data does on Js Reverse
AI agents call extract_form_data to retrieve information from Js Reverse without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why extract_form_data is rated Low
This tool retrieves form data from a webpage without altering it. While it can expose sensitive information (form values, hidden fields, potentially CSRF tokens or secrets), the primary capability is read-only data extraction.
From the tool's definition Tool 'extract_form_data' is described as extracting and returning form structure and current values including hidden fields. The verb 'extract' and 'returns' indicate data retrieval with no modification.
Attacks that exploit this kind of access
The rule that runs extract_form_data safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Js Reverse, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For extract_form_data, this is the rule to start with:
extract_form_data is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Js Reverse, apply this rule, and every extract_form_data call is checked against it from then on.
Questions about extract_form_data
Extract form structure and current values, including hidden fields. By default returns all matching forms; pass formIndex to inspect a single form. Password values are masked unless maskPasswords is set to false. It is categorised as a Read tool in the Js Reverse MCP Server, which means it retrieves data without modifying state.
Register the Js Reverse MCP server in PolicyLayer and add a rule for extract_form_data: 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 Js Reverse. Nothing to install.
extract_form_data 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_form_data 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_form_data. 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_form_data is provided by the Js Reverse MCP server (1600822305/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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