Collect JavaScript code from a page with smart modes (summary/priority/incremental/full).
AI agents call collect_code to retrieve information from JS Reverse MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves JavaScript code from a page for analysis purposes. While it operates within a browser context (part of reverse engineering workflow), it performs read-only operations—extracting/querying existing code without altering, deleting, or executing arbitrary code. The smart modes (summary, priority, incremental, full) are variations on retrieval strategy, not side effects.
From the tool's definition Collect JavaScript code from a page with smart modes (summary/priority/incremental/full). The verb 'collect' indicates data retrieval, and the description specifies modes for reading code with varying levels of completeness but no modification or execution…
Attacks that exploit this kind of access
Collect JavaScript code from a page with smart modes (summary/priority/incremental/full). It is categorised as a Read tool in the JS Reverse MCP MCP Server, which means it retrieves data without modifying state.
Register the JS Reverse MCP server in PolicyLayer and add a rule for collect_code: 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 MCP. Nothing to install.
collect_code 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 collect_code 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 collect_code. 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.
collect_code is provided by the JS Reverse MCP server (noone-hub/jsreverser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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